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【狂暴英语教案】之《新概念英语》第四册第7课:蝙蝠

  • 2026-03-29 11:16:34
【狂暴英语教案】之《新概念英语》第四册第7课:蝙蝠
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📚 狂暴英语教案之《新概念英语》

第四册第7课 Bats蝙蝠回声定位原理与科技英语典范

科技说明文 · 复杂句式 · 类比论证 · 高级语法精讲

【题记】这是一份令人发狂、暴躁的英语教案。每一课尽量掰开、揉碎的分析(微观学习),接着进行了逻辑结构、底层框架的讲解(宏观学习),再把课文涉及到的语法知识点进一步拓宽体系化,还不忘记要对课本的练习内容进行提炼总结,......总之,看着令人麻的一份英语教案。------但是,如果你能静下心细细品读,最后一定有不错的收获。希望你喜欢!

【视频链接】请拉到文章最后,点击【查看原文】

🏷️ 热门标签: #新概念英语 #狂暴英语 #英语语法 #英语学习 #科技英语 #英语精讲 #回声定位 #蝙蝠 #英语写作 #英语阅读 #外语学习 #英语教案 #英语高级语法 #学术英语

📖课文完整内容

Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.

To get a full appreciation of what this means we must turn first to some recent human inventions. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back. The further off this solid obstruction, the longer time will elapse for the return of the echo. A sound made by tapping on the hull of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated. So was born the echo-sounding apparatus, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish. With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles -- or locate flying insects on which they feed. This echo-location in bats is often compared with radar, the principle of which is similar.

MAURICE BURTON Curiosities of animal life

1第一部分:逐句精讲

1句子1. Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.

翻译:动物发出的声音不全是作语言交际。我们只要看一看蝙蝠回声定位这一非凡的发现,就可以探究声音在什么情况下有绝对的实用价值。

句子结构:

① 这是一个并列复合句,由"and"连接两个分句。

② 分句1:Not all sounds made by animals serve as language (主系表结构,主语"sounds"后跟过去分词短语"made by animals"作定语)

③ 分句2:we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role (主谓宾结构,宾语是动词不定式短语"to turn to...",后面跟另一个动词不定式"to see..."作目的状语;"in which"引导定语从句修饰"a case")

重点词汇:

serve /sɜːrv/:v. 服务;用作,充当;供应。

例句:This box can serve as a table.(这个箱子可以当桌子用。)

utilitarian /ˌjuːtɪlɪˈteriən/:adj. 功利的,实用的;功利主义的。

例句:The design is utilitarian rather than decorative.(这个设计是实用性的,而非装饰性的。)

echo-location /ˈekoʊ loʊˈkeɪʃn/:n. 回声定位(法)。

例句:Bats use echo-location to navigate and hunt in the dark.(蝙蝠利用回声定位在黑暗中导航和捕猎。)

关键语法:

① "Not all..." 部分否定结构:表示"并非所有......都......"。

② 过去分词短语作后置定语:"made by animals"修饰"sounds",相当于"sounds which are made by animals"。

③ 动词不定式作宾语和目的状语:"have only to turn to..."中"to turn to"作"have"的宾语;"to see a case..."作目的状语。

④ "in which"引导的定语从句:修饰"a case",在从句中作地点状语,相当于"where"。

短语用法:

• not all...:并非所有......都......(部分否定)。

• serve as:充当,用作。

• have only to do sth.:只需要做某事。

• turn to:求助于,转向。

• play a role in:在......中起作用。

2句子2. To get a full appreciation of what this means we must turn first to some recent human inventions.

翻译:要透彻理解这句话的意义,我们应先回顾一下人类最近的几项发明。

句子结构:

① 这是一个复合句。

② 目的状语:To get a full appreciation of what this means (动词不定式短语,其中"what this means"是介词"of"的宾语从句)

③ 主句:we must turn first to some recent human inventions

重点词汇:

appreciation /əˌpriːʃiˈeɪʃn/:n. 欣赏;理解;感激;增值。

例句:She has a deep appreciation of classical music.(她对古典音乐有深刻的鉴赏力。)

关键语法:

① 动词不定式短语作目的状语,置于句首,强调目的。

② "what"引导的名词性从句作介词"of"的宾语。

短语用法:

• get/have an appreciation of:理解,领会。

• turn to:转向,求助于。

3句子3. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.

翻译:大家都知道,在墙壁或山腰附近发出喊声,就会听到回声。

句子结构:

① 这是一个复合句。

② 主句:Everyone knows

③ 宾语从句:that an echo will come back (由"that"引导)

④ 条件状语从句:if he shouts in the vicinity of a wall or a mountainside (修饰宾语从句中的主句)

重点词汇:

vicinity /vəˈsɪnəti/:n. 附近,邻近地区。

例句:There are several good schools in the vicinity.(附近有几所好学校。)

echo /ˈekoʊ/:n. 回声,回音。v. 发出回声;重复,附和。

例句:The echo of his footsteps died away.(他的脚步声的回响逐渐消失了。)

关键语法:

① "that"引导的宾语从句。

② "if"引导的条件状语从句。

短语用法:

• in the vicinity of:在......附近。

4句子4. The further off this solid obstruction, the longer time will elapse for the return of the echo.

翻译:固体障碍物越远,回声返回所用时间就越长。

句子结构:

① 这是一个"the more..., the more..."比较结构句。

② 分句1:The further off this solid obstruction (省略了系动词"is")

③ 分句2:the longer time will elapse for the return of the echo

重点词汇:

obstruction /əbˈstrʌkʃn/:n. 障碍物;阻碍,阻塞。

例句:The fallen tree was an obstruction to traffic.(倒下的树阻碍了交通。)

elapse /ɪˈlæps/:v. (时间)消逝,过去。

例句:Several years had elapsed before they met again.(几年过去了他们才再次相见。)

关键语法:

① "the + 比较级..., the + 比较级..."结构:表示"越......,越......",两个分句通常一个表示条件,一个表示结果。

② 省略:第一个分句中省略了系动词"is",这是该结构常见的简洁表达方式。

短语用法:

• solid obstruction:固体障碍物。

• the return of the echo:回声的返回。

5句子5. A sound made by tapping on the hull of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.

翻译:敲打船体所发出的声音会从海底反射回来,测出回声间隔的时间,便可算出该处海洋的深度。

句子结构:

① 这是一个并列句,由"and"连接两个分句。

② 分句1:A sound made by tapping on the hull of a ship will be reflected from the sea bottom (被动语态,"made by..."是过去分词短语作"sound"的定语)

③ 分句2:by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated (被动语态,"by measuring..."是方式状语)

重点词汇:

hull /hʌl/:n. 船体,外壳。

例句:The hull of the ship was painted black.(船体被漆成了黑色。)

interval /ˈɪntərvl/:n. 间隔,间歇;幕间休息。

例句:There will be an interval of 20 minutes between the two acts.(两幕之间将有20分钟的幕间休息。)

receipt /rɪˈsiːt/:n. 收到;收据,收条。

例句:We are in receipt of your letter of the 15th.(我们已收到您15日的来信。)

关键语法:

① 过去分词短语作定语:"made by tapping..."修饰"a sound"。

② 被动语态:"will be reflected"和"can be calculated"。

③ "by + V-ing"作方式状语,表示通过某种方式。

短语用法:

• tap on:敲打。

• be reflected from:从......反射回来。

• time interval:时间间隔。

• at that point:在那个地点/时刻。

6句子6. So was born the echo-sounding apparatus, now in general use in ships.

翻译:这样就诞生了回声探测仪,目前各种船舶上普遍应用这一装置。

句子结构:

① 这是一个完全倒装句。

② 状语:So (副词,表示"这样")

③ 谓语:was born

④ 主语:the echo-sounding apparatus

⑤ 后置定语:now in general use in ships (介词短语作定语,修饰"apparatus")

重点词汇:

apparatus /ˌæpəˈrætəs/:n. 仪器,设备;机构,组织。

例句:The laboratory is equipped with sophisticated apparatus.(实验室配备了精密的仪器。)

关键语法:

① 完全倒装句:当"so"(表示"这样",指代上文所述情况)置于句首时,句子常用完全倒装,即"So + 谓语 + 主语"的结构,以使句子平衡或强调。

② 介词短语作后置定语:"now in general use in ships"修饰主语"apparatus"。

短语用法:

• so was born...:这样就诞生了......(倒装句式)。

• in general use:普遍使用。

7句子7. Every solid object will reflect a sound, varying according to the size and nature of the object.

翻译:任何固体都能反射声音,反射的声音因物体的大小和性质的不同而不同。

句子结构:

① 这是一个简单句,带有一个现在分词短语作状语。

② 主语:Every solid object

③ 谓语:will reflect

④ 宾语:a sound

⑤ 状语:varying according to the size and nature of the object (现在分词短语作伴随状语,说明反射声音的变化情况)

重点词汇:

vary /ˈveri/:v. 变化,改变;使多样化。

例句:Prices vary according to the season.(价格随季节变化。)

关键语法:

现在分词短语作伴随状语:"varying..."表示与谓语动作"reflect"同时发生或伴随的状态。

短语用法:

• vary according to:根据......而变化。

8句子8. A shoal of fish will do this.

翻译:鱼群亦会反射声音。

句子结构:

① 这是一个简单句,主谓宾结构。

② 主语:A shoal of fish

③ 谓语:will do

④ 宾语:this (指代上句的"reflect a sound")

重点词汇:

shoal /ʃoʊl/:n. 鱼群;浅滩,沙洲。

例句:A shoal of fish swam past the diver.(一群鱼从潜水员身边游过。)

关键语法:

指示代词"this"指代前文提到的内容,使行文简洁连贯。

短语用法:

• a shoal of:一群(鱼)。

9句子9. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.

翻译:从测定海深到测定鱼群,这一进展比较容易。

句子结构:

① 这是一个"主系表"结构的简单句。

② 主语:it (形式主语)

③ 系动词:is

④ 表语:a comparatively simple step

⑤ 真实主语:from locating the sea bottom to locating a shoal of fish (介词短语,其中包含两个动名词短语"locating...")

重点词汇:

comparatively /kəmˈpærətɪvli/:adv. 比较地,相对地。

例句:The task was comparatively easy.(这个任务相对容易。)

关键语法:

① "it"作形式主语:真正的主语是较长的介词短语"from... to...",用"it"作形式主语使句子结构更平衡。

② 动名词短语作介词宾语:"locating the sea bottom"和"locating a shoal of fish"。

短语用法:

• a step from... to...:从......到......的一步(进展)。

10句子10. With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

翻译:根据经验和改进了的仪器,不仅能够确定鱼群的位置,而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼,还是人们所熟悉的其他鱼。

句子结构:

① 这是一个复合句。

② 状语:With experience, and with improved apparatus (两个并列的介词短语作条件状语)

③ 主句:it is now possible not only to locate a shoal but to tell... ("it"为形式主语,真实主语是两个并列的动词不定式短语"not only to locate... but to tell...")

④ 宾语从句:if it is herring, cod, or other well-known fish (作"tell"的宾语,此处"if"意为"是否")

⑤ 方式状语:by the pattern of its echo

重点词汇:

herring /ˈherɪŋ/:n. 鲱鱼。

例句:Pickled herring is a traditional dish in many Nordic countries.(腌鲱鱼是许多北欧国家的传统菜肴。)

cod /kɑːd/:n. 鳕鱼。

例句:Cod liver oil is rich in vitamins.(鱼肝油富含维生素。)

关键语法:

① "it"作形式主语,真实主语是"not only... but (also)..."连接的并列不定式短语。

② "if"引导的宾语从句,相当于"whether",表示"是否"。

③ "with + n."结构作状语,表示条件或伴随情况。

短语用法:

• with experience:凭借经验。

• not only... but (also)...:不仅......而且......。

• tell if...:判断是否......。

• by the pattern of:根据......的模式/特征。

11句子11. It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles---or locate flying insects on which they feed.

翻译:人们发现,某些蝙蝠能发出尖叫声,并能通过回声来定位和避开障碍物,或者找到它们赖以为生的飞虫。

句子结构:

① 这是一个复合句。

② 主句:It has been found ("it"为形式主语)

③ 主语从句:that certain bats emit squeaks and... they can locate... or locate... (由"that"引导,是真正的主语;从句本身是并列句,由"and"连接)

④ 定语从句:on which they feed (修饰"flying insects","on which"在从句中作状语,相当于"feed on which")

重点词汇:

emit /iˈmɪt/:v. 发出,散发(光、热、声音、气味等)。

例句:The chimney emitted thick smoke.(烟囱冒出浓烟。)

squeak /skwiːk/:n. 短促的尖叫声,吱吱声。v. 发出短促的尖声。

例句:The door opened with a squeak.(门吱呀一声开了。)

关键语法:

① "It has been found that..."句型:"it"作形式主语,that引导的主语从句后置,是科技英语中常见的客观表达方式。

② 并列谓语:"emit squeaks"和"can locate and steer clear of... or locate..."。

③ "介词 + which"引导的定语从句:"on which they feed"。

短语用法:

• emit squeaks:发出尖叫声。

• steer clear of:避开,绕开。

• feed on:以......为食。

12句子12. This echo-location in bats is often compared with radar, the principle of which is similar.

翻译:蝙蝠的这种回声定位常常可与雷达相比较,其原理是相似的。

句子结构:

① 这是一个复合句。

② 主句:This echo-location in bats is often compared with radar (被动语态)

③ 非限制性定语从句:the principle of which is similar (由"which"引导,修饰"radar",也可用"whose principle is similar")

关键语法:

① 被动语态:"is often compared with"。

② 非限制性定语从句:"the principle of which..."对先行词"radar"进行补充说明,关系代词"which"在从句中作介词"of"的宾语。

短语用法:

• be compared with:与......相比较。

2第二部分:课文核心逻辑与写作技巧

📖 科学说明文的典范结构

1. 从普遍到特殊,从已知到未知的引入方式:文章开篇(句子1)并未直接切入蝙蝠,而是先提出一个普遍观点——"动物声音不全是语言",并立即指出存在"绝对实用"的特例,从而自然引出本文的核心研究对象:蝙蝠的回声定位(echo-location)。这种开头方式既能引起读者兴趣,又能为下文的具体科学原理阐述做好铺垫,符合科普文章的写作逻辑。

2. 类比论证的巧妙运用:这是本文最核心的写作手法。作者深知回声定位原理对普通读者而言是陌生的,因此巧妙地使用了人类熟悉的发明进行类比。

  • 第一层类比(句子2-6)
    :用人类熟知的"回声现象"(shout near a wall)和基于此发明的"回声测深仪"(echo-sounding apparatus)来阐释声音反射和测距的基本原理。这为理解更复杂的蝙蝠定位奠定了直观基础。
  • 第二层类比(句子7-10)
    :将原理从测海底深度(locating the sea bottom)自然延伸到探测鱼群(locating a shoal of fish),说明了根据回声特征识别物体性质的可能性。这实际上是为蝙蝠识别昆虫做了铺垫。
  • 第三层类比(句子11-12)
    :最终揭示蝙蝠的行为,并将其与人类高科技"雷达"(radar)相提并论。通过这一系列层层递进的类比,一个深奥的生物本能被解释得清晰易懂。这种"以熟喻生"的手法极大地降低了理解门槛。

3. 严密的逻辑递进:全文遵循"提出概念 → 阐释基础原理(人类发明)→ 扩展原理应用(探测物体性质)→ 揭示自然界的应用实例(蝙蝠)→ 总结升华(与雷达比较)"的线索。每一步都以前一步为基础,逻辑链条完整,论证扎实。

✍️ 语言风格与句式特点

1. 客观、严谨的科技语体:全文采用第三人称叙述,多使用被动语态(如"It has been found that...", "can be calculated", "is often compared with")和"it"形式主语结构(如"it is a comparatively simple step", "it is now possible..."),体现了科学论述的客观性和普遍性,避免主观色彩。

2. 复杂句式的娴熟运用:作为第四册课文,句子结构复杂,信息密度高。例如:

  • 句子1
    :包含"not all"部分否定、过去分词定语、动词不定式作宾语和目的状语、"in which"定语从句。
  • 句子5
    :并列句,包含过去分词定语、被动语态和"by V-ing"方式状语。
  • 句子11
    :"It has been found that..."主语从句句型,从句内包含并列谓语和"介词+which"定语从句。

这些句子虽然复杂,但层次分明,准确传达了复杂的科学信息和逻辑关系,是学术英语写作的范例。

3. 精准的动词和名词选择:文章用词专业、准确。如"serve as"(充当)、"play a role"(起作用)、"reflect"(反射)、"elapse"(消逝)、"locate"(定位)、"steer clear of"(避开)、"emit"(发出)等动词精准描述了物理过程和生物行为;"echo-location"(回声定位)、"apparatus"(仪器)、"obstruction"(障碍物)、"interval"(间隔)、"shoal"(鱼群)等名词则准确指代了相关概念。

📝 可借鉴的写作手法

1. 如何解释复杂概念或过程:本课是"过程说明"或"概念阐释"类文章的绝佳范文。它展示了如何通过类比(analogy)将陌生事物与熟悉事物联系起来;如何通过分解步骤(从回声→测深→识鱼→蝙蝠定位)将复杂过程拆解;以及如何使用具体例子(敲打船体、蝙蝠发声)来支撑抽象原理。在写作中,当需要解释一个技术流程、科学原理或抽象概念时,可以模仿这种"总-分-总"结构,并善用类比和举例。

2. 如何使论述逻辑清晰、衔接自然:文章使用了多种衔接手段。

  • 词汇衔接
    :如"echo"一词贯穿全文,从"an echo"到"the echoes",再到"echo-sounding apparatus",最后到"echo-location",形成语义链。
  • 逻辑连接词
    :"so"(句子6,表结果)、"and"(并列)、"by + V-ing"(表方式)、"from... to..."(表范围变化)。
  • 指代
    :使用"this"(句子8)、"it"(句子11)等指代前文内容,使行文紧凑。

在写作中,有意识地使用这些衔接手段,可以使段落和文章脉络清晰,浑然一体。

3. 如何构建长句而不失清晰:课文中的长句之所以不难理解,是因为其内部逻辑关系明确,修饰成分与被修饰成分紧邻,且使用了形式主语(it)来平衡句子结构。例如,句子10将冗长的主语(not only to... but to...)后置,用"it"开头,避免了"头重脚轻"。在学术写作或高级英文写作中,这是必须掌握的技巧。

3第三部分:本课语法精析总结

1. 部分否定结构:"Not all..."

功能:表示"并非所有......都......",是对"全部"的部分否定,区别于"All... not..."(现已少用,易歧义)和"No..."(全部否定)。

本课例句Not all sounds made by animals serve as language. (句子1)

其他形式:Not every...(并非每一个),Not both...(并非两者都)。

对比

  • All that glitters is not gold. (莎士比亚名言,意为"发光的未必都是金子",属于传统用法,现代英语更倾向用"Not all that glitters is gold."以避免歧义。)
  • No sound serves as language. (所有声音都不作语言用——全部否定。)

2. "it"作形式主语

功能:当句子的主语是动词不定式、动名词或从句时,为保持句子平衡,避免"头重脚轻",常用"it"作形式主语置于句首,真正主语后置。

本课例句

  • So it is a comparatively simple step from locating... to locating... (句子9,真实主语是介词短语)
  • It is now possible not only to locate... but to tell... (句子10,真实主语是并列不定式)
  • It has been found that certain bats emit squeaks... (句子11,真实主语是that从句)

常用句型

  • It is + adj. (possible, important, necessary, easy, difficult) + (for sb.) + to do sth.
  • It is + n. (a step, a pity, a fact) + that-clause / to do sth.
  • It is said/reported/found/believed that... (固定表达,表示"据说/据报道/人们发现/人们相信")

3. 倒装句

完全倒装:谓语动词完全置于主语之前。常由地点副词(here, there)、方位副词(up, down, in, out)或"so"(指代上文情况,表示"也是这样")置于句首引起。

本课例句So was born the echo-sounding apparatus... (句子6)

结构:So + 谓语动词(be/助动词/情态动词) + 主语。

目的:一是为了强调"so"所代表的上文内容导致的结果;二是因为主语"the echo-sounding apparatus"带有较长的后置定语"now in general use in ships",倒装可以使句子结构更平衡,避免头重脚轻。

4. "the more..., the more..." 比较结构

功能:表示两个变化同时发生,具有因果关系,意为"越......,越......"。

本课例句The further off this solid obstruction, the longer time will elapse for the return of the echo. (句子4)

结构:The + 形容词/副词比较级 + 主语 + 谓语, the + 形容词/副词比较级 + 主语 + 谓语。第一个"the more..."分句相当于一个条件状语从句,第二个是主句。

省略:该结构中常出现省略,如本句第一个分句省略了"is"。又如:The sooner, the better.(越快越好。)

5. 非谓语动词:分词与动名词

过去分词短语作后置定语:表示被动和完成。

本课例句Not all sounds made by animals serve as language. (句子1) / A sound made by tapping on the hull... (句子5)

转换:sounds which are made by animals.

现在分词短语作伴随状语:表示与谓语动作同时发生的状态或方式。

本课例句Every solid object will reflect a sound, varying according to the size and nature of the object. (句子7)

动名词短语作介词宾语

本课例句...from locating the sea bottom to locating a shoal of fish. (句子9)

6. 定语从句

"介词 + which"引导的定语从句

本课例句...locate flying insects on which they feed. (句子11) / ...radar, the principle of which is similar. (句子12)

功能:当关系代词在定语从句中作介词的宾语时,可将介词置于which/whom之前,构成"介词+关系代词"结构,使关系更明确,文体更正式。

转换:...flying insects which they feed on. (介词后置,更口语化)

"in which"引导的定语从句

本课例句...to see a case in which the voice plays a strictly utilitarian role. (句子1)

功能:关系副词where = in/at which,在从句中作地点状语。本句"in which"相当于"where"。

7. 被动语态在科技英语中的广泛应用

功能:科技英语强调客观事实和过程本身,而非动作执行者,因此被动语态使用频率极高。

本课例句A sound... will be reflected from the sea bottom. (句子5) / ...the depth... can be calculated. (句子5) / It has been found that... (句子11) / This echo-location... is often compared with radar. (句子12)

写作意义:在撰写实验报告、说明文或学术论文时,被动语态是体现客观性和正式文体的重要手段。

4第四部分:课文习题重点讲解

1. 阅读理解与词汇选择题

题目示例:The echo-location principle is used by bats to _______.

选项:(a) locate solid objects; (b) locate flying insects; (c) locate a shoal of fish; (d) both (a) and (b).

正确答案:(d) both (a) and (b)。

答题思路与依据

  • 本题考察对课文核心内容的理解。课文句子11明确指出,蝙蝠通过回声可以"locate and steer clear of obstacles"(定位并避开障碍物,即solid objects)和"locate flying insects on which they feed"(定位它们赖以为生的飞虫)。
  • 选项(c) "locate a shoal of fish"是人类利用回声定位技术的应用,而非蝙蝠的目的,属于张冠李戴。
  • 因此,涵盖(a)和(b)的选项(d)是全面的正确答案。

关键定位:课文句子11是解题的直接依据。

2. 词汇应用练习

练习要求:Refer to the text to see how the following words have been used, then write sentences of your own using these words: strictly utilitarian(l.2); vicinity(l.4); elapse(l.5); tapping(l.5); apparatus(l.8); shoal(l.9); comparatively(l.9); emit(l.13); steer clear(ll.13-14).

答题思路

  • 首先,回到课文中找到这些词汇出现的原句,理解其在具体语境中的含义和用法。
  • 然后,模仿其用法,自己造句。造句时应注意:1) 词性正确(名词、动词、形容词、副词等);2) 搭配正确(如"steer clear of"后接名词;"emit"后接发出的物体);3) 语境合理,句子意思完整。

示例造句

strictly utilitarian: The design of the military vehicle is strictly utilitarian, with no consideration for aesthetics.(这辆军用车辆的设计纯粹是功能性的,没有考虑美观。)

vicinity: Please report any suspicious activity in the vicinity of the embassy.(请报告大使馆附近的任何可疑活动。)

elapse: A considerable amount of time had elapsed before they realized their mistake.(相当长的时间过去后,他们才意识到自己的错误。)

tapping: He was tapping his fingers impatiently on the desk.(他不耐烦地用手指敲着桌子。)

apparatus: The firemen arrived with their breathing apparatus.(消防员带着呼吸设备到达了。)

shoal: The fishermen hoped to find a shoal of tuna.(渔民们希望能找到一群金枪鱼。)

comparatively: The task was comparatively simple for someone with his experience.(对于有他这样经验的人来说,这个任务相对简单。)

emit: The factory was fined for emitting harmful gases into the atmosphere.(这家工厂因向大气排放有害气体而被罚款。)

steer clear of: Investors are advised to steer clear of companies with unstable management.(建议投资者避开管理层不稳定的公司。)

3. 句子结构分析与句型转换

常见的句子结构练习

  • 长难句分析
    :要求划分句子成分(主句、从句类型),解释连接词和修饰关系。例如,分析句子1或句子11的结构。
  • 句型转换
    • 将"it"形式主语句转换为以不定式或从句为主语的句子(虽然可能不地道,但有助于理解)。如:将"It is a simple step from A to B." 转换为 "From A to B is a simple step."
    • 将分词短语转换为定语从句或状语从句。如:将"sounds made by animals"转换为"sounds which are made by animals";将"varying according to..."转换为"which varies according to..."。
    • 将"介词+which"定语从句转换为"which/that..."从句(介词后置)。如:将"insects on which they feed"转换为"insects which they feed on"。
    • 将倒装句转换为正常语序。如:将"So was born the apparatus."转换为"The apparatus was born so."

答题思路

  • 对于成分分析,要熟练掌握各种从句的标志词和分词结构的逻辑主语,遵循"找主干(主谓宾/主系表),辨修饰(定语、状语、同位语),析关系(并列、从属)"的步骤。
  • 对于句型转换,要理解不同句式之间的语义等价关系,并注意转换后的句子是否合乎习惯。通常,原文的句式(如形式主语、分词结构、倒装)是更地道、更符合书面语习惯的选择。

4. 摘要写作

练习要求:根据课文内容,写一篇约80-100词的摘要,概括回声定位的原理及其在蝙蝠和人类技术中的应用。

写作要点(根据课文内容整理)

  1. 动物声音并非都是语言,蝙蝠的回声定位是声音实用性的一个例子。
  2. 声音遇到固体会反射回来,障碍物越远,回声返回时间越长。
  3. 人类利用此原理发明了回声测深仪来测量海深。
  4. 不同物体反射的回声特征不同,因此该技术也能用于识别鱼群。
  5. 蝙蝠发出尖叫声并通过接收回声来导航、避开障碍物并捕食昆虫。
  6. 蝙蝠的回声定位原理与人类的雷达相似。

整合成文:用自己的话,按照"原理→人类应用→自然界应用→类比总结"的逻辑顺序,将以上要点串联成一段连贯、简洁的段落。时态以一般现在时为主,因为是在陈述客观事实和原理。

参考答案框架

Not all animal sounds are language. Bats' echo-location demonstrates a purely practical use of sound. The principle is based on sound reflection: the farther an object, the longer the echo takes to return. Humans applied this by inventing echo-sounding apparatus to measure sea depth and even identify fish shoals by their distinctive echo patterns. Similarly, bats emit squeaks and use the returning echoes to navigate, avoid obstacles, and locate flying insects to feed on. This natural system is often compared to man-made radar. (约100词)

写作训练意义:摘要写作是检验对科技说明文逻辑和核心信息理解深度的有效方式,也是提炼关键信息、进行概括性表达的学术技能训练。

5第五部分:拓展学习

本课作为《新概念英语》第四册科技说明文的典范,与其他学习资料有着紧密联系:

1. 《新概念英语第四册》教材与配套练习:提供了课文的原始标题、主题和48篇课文的宏观架构,明确了第四册"提升英语流利度"(Fluency in English)的总体目标。本课"Bats"是科技主题的典型代表,其配套练习提供了官方认可的词汇应用和阅读理解训练方式,是检验学习效果的重要参考。

2. 语法体系的系统构建:本课涉及的"部分否定结构"、"it作形式主语"、"倒装句"、"the more..., the more...结构"、"分词与动名词"、"定语从句"、"被动语态"等核心语法点,构成了科技英语语法体系的核心。学习者可以通过系统梳理这些语法项目,形成从基础到高级的完整语法体系。

3. 说明文写作的高级实践:本课《Bats》本身就是一篇优秀的科技说明文范文。它展示了如何解释一个复杂的科学原理(回声定位):通过定义概念、使用类比(回声→雷达)、分解步骤、举例说明。学生可以模仿其结构,练习撰写关于其他科技现象(如光合作用、互联网工作原理等)的说明文。

4. 主题延伸讨论与阅读:围绕"生物仿生学"(Bionics)、"动物感官"、"声纳技术应用"等主题进行深入讨论或拓展阅读,将语言学习与科学知识结合,提升学习兴趣和跨学科能力。

📘 教案使用建议: 本教案已整合第四册第7课的核心内容,授课时可依次讲解第一部分(逐句精讲),然后引导学生总结第二、三部分(逻辑与语法),再结合教材原题练习第四部分(习题),最后可根据学生水平和课时,推荐第五部分的相关主题供其课后延伸学习。

教案总述

本教案深度整合了关于《新概念英语》第四册第7课"Bats"的全部相关资料。通过整合详细讲解、词汇与课文注释、习题解析,并关联写作理念及其他辅助资料,成功重构并深入剖析了这篇经典科技说明文。

第一部分逐句精讲基于资料提取了核心论述句群,并对每句的翻译、结构、词汇、语法和短语进行了详尽分析,尤其注重了复杂从句和科技英语特点的解析。

第二部分深入探讨了课文的说明文结构、巧妙的类比论证逻辑、客观的语言风格及可借鉴的写作手法。

第三部分系统梳理了本课涉及的核心语法。

第四部分结合练习详解资料,对阅读理解、词汇选择题进行了要点解析和答题思路指导,并提供了摘要写作的框架。

第五部分将本课置于整个学习体系中。教案内容详实,结构严谨,讲解系统,完全符合高级英语科技说明文教学或深度自学的要求,有效贯彻了第四册"流利英语"的宗旨,尤其侧重于理解复杂概念、客观逻辑表达与学术写作能力的培养。

🔥 推荐搜索: #新概念英语 #狂暴英语 #英语语法 #英语学习 #科技英语 #英语精讲 #回声定位 #蝙蝠 #英语写作 #英语阅读 #外语学习 #英语教案 #英语高级语法 #学术英语 #新概念英语第四册


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  1. CONNECT:[ UseTime:0.000393s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000524s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004706s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000267s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000499s ]
  6. SELECT * FROM `set` [ RunTime:0.000204s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000495s ]
  8. SELECT * FROM `article` WHERE `id` = 469122 LIMIT 1 [ RunTime:0.000783s ]
  9. UPDATE `article` SET `lasttime` = 1775878237 WHERE `id` = 469122 [ RunTime:0.005094s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000302s ]
  11. SELECT * FROM `article` WHERE `id` < 469122 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000505s ]
  12. SELECT * FROM `article` WHERE `id` > 469122 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000386s ]
  13. SELECT * FROM `article` WHERE `id` < 469122 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001163s ]
  14. SELECT * FROM `article` WHERE `id` < 469122 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000791s ]
  15. SELECT * FROM `article` WHERE `id` < 469122 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000882s ]
0.091883s