【最新】高中人教版英语选修8课件：Unit+2+Section+Ⅳ+Learning+about+Language+&+Using+Language

20 世纪 50 年代：克隆青蛙 20 世纪 70 年代：用老鼠胚胎进行研究 1979 年：对羊和老鼠的胚胎进行研究 1981 年：首次对老鼠进行实验性的克隆 1983 年：首次对奶牛进行实验性的克隆 1996 年：首次克隆哺乳动物(多莉羊) 2000 年：奶牛生野牛 2001 年：中国首次克隆出双胞胎小牛 2002 年：首次克隆猫 2005 年：首次克隆狗 ……
with
what we know now, this is either unsuitable.
There are many reasons.
[原文呈现] [读文清障] •The initial⑲ requirement is that ⑲initial/I'nI ʃl/adj.最初的； 开始的 you need perfect DNA⑳ (which ⑳DNA 脱氧核糖核酸 21 that 引导表语从句， which gives information for how cells ○ 引导定语从句，修饰 DNA。 21 . are to grow)○ 22 in vain 白费力气；枉费心机 ○ •All efforts of cloning an animal vain/vein/adj.虚荣的；自负的； 22 if there is not will be in vain○ 徒劳的 23 diversity n．差异(性)；不同 23 enough diversity ○ in the ○ (点)；多样化 24 ○ group to overcome illnesses. 24 overcome v．战胜；克服 ○ Diversity in a group means
⑤
in which a
scientist clones several kinds of⑥
[读文清障] ①extinct adj.灭绝的；消亡的 ②介词短语 of cloning ...作定语， 修饰 The possibility。 ③popularity/ˌpɒpjʊ'lærətI/n.受 人喜爱；流行 ④such as 例如 ⑤Jurassic/dʒʊə'ræsIk/Park 《侏 罗纪公园》(美国电影名) ⑥several kinds of 几种
embryos of mice 作定语， 修饰 research。 ⑬Dolly the sheep 多莉羊 ⑭bison/'baIsn/n.北美或欧 洲野牛 ⑮calf/kɑːf/n.小牛；牛犊
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恐龙的回归？ [第 1 段译文] 克隆凶猛和灭绝的野生动物的可能性一直使电影制片商感 到兴奋。然而他们并不是唯一对此感到兴奋的人！在《侏罗纪 公园》这部影片中，有一位科学家克隆了好几种不同的绝种恐 龙。类似这样的电影很受欢迎，证明了这一想法使人们感到既 兴奋又恐惧。但事实上，要想克隆绝种动物，我们还有很长的 路要走。科学家们现在还在进行克隆哺乳动物实验。这是因为 克隆哺乳动物仍然还是一门新的科学，它是从 20 世纪 50 年代 才开始认真进行研究的，如下列所示：
⑱
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⑯ from time to time ( 相当于 sometimes, not very often)不 时；偶尔 ⑰bring back to life 使复生； 使 复活 ⑱ either ... or ... 或者 …… 或 者 …… ； 要 么 …… 要 么……(连接并列结构)
Section Ⅳ Learning about Language & Using Language
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THE RETURN OF THE DINOSAURS? The possibility of cloning fierce and extinct① wild animals② has always excited film makers. And they are not the only ones! The popularity ③ of films such as ④ Jurassic Park ，
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cloning because
⑩
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This is of
⑩This is because ... 这是因 为……， because 后接表原 因的句子， 在此是表语从句。
mammals. the
cloninscience and its story only began
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⑦
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struck)打；撞击；罢工 n.罢工 strike ... into one’ s heart 使…… 刻骨铭心 films proves how ...其中 in which 引导非限制性定语从句，修饰 Jurassic Park。how 引导宾语从 句，作 proves 的宾语。 ⑨experiment with 用……做实验
seriously in the 1950s as this list ⑪as this list shows 是 as 引导 的方式状语从句。 shows⑪：
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1950s cloning of frogs 1970s research using the embryos of mice⑫ ⑫现在分词短语 using the 1979 work on embryos of sheep and mice 1981 first experimental clones of mice 1983 first experimental clones of cows 1996 first clone of a mammal: Dolly the sheep⑬ 2000 cow gave birth to a bison⑭ 2001 China’s first cloned twin calves⑮ 2002 first cloned cats 2005 first cloned dog ...
extinct dinosaurs, proves how ⑦strike/straIk/vt. & vi. (struck, the idea struck a mixture of fear and excitement
⑧
into
people’s hearts . But in fact ⑧该句主干是 The popularity of we are a long way from being able to clone extinct animals. Scientists are still experimenting with⑨
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From time to time⑯ people suggest that extinct animals like dinosaurs, can possibly be brought back to life ⑰ through cloning. impossible Unfortunately, or