Unit 2Cloning 1.differ vi.不同;相异Think about how they differ. ( 教材 P10)想一想他们如何不同。①differ from sb./sth. 与某人 /某物不同differ from /with sb. about/on sth. 关于某事与某人有异议differ in... 在⋯⋯ 方面不同②make a difference 有影响,很重要the difference between A and BA 与 B 之间的不同③be different from sb.in... 在⋯⋯ 方面不同于某人2.exact adj.准确的;精确的;严谨的;一丝不苟的It is a way of making an exact copy of another animal or plant.(教材 P11)这是一种用来生产与原型完全相同的动植物的方法。exactly adv.确切地;究竟;到底to be exact 确切地说 (=exactly speaking) not exactly 不完全;一点也不;根本不Exactly speaking , the result is wrong. 确切地说,这个结果不正确。3.The fact that she seemed to develop normally was very encouraging. ( 教材 P11) 看来多莉是在正常地成长着,这很令人鼓舞。句中 that 引导同位语从句来说明fact 的具体内容。同位语从句可由when,where,how ,why ,that,whether 等词引导。 同位语从句一般放在idea,fact, news,hope,belief ,thought,doubt,question 等抽象名词之后,用以说明抽象名词的具体内容。有时为了保持句子的平衡,同位语从句还可以放在动词的后面。(2013 ·浙江高考 )The only way to succeed at the highest level is to have total belief ________ you are better than anyone else on the sports field. A.howB.that C.which D.whether 4.Cloning plants is straightforward while cloning animals is very complicated.( 教材 P11) 克隆植物简单,但克隆动物就很复杂了。while 在本句中表示 “对比 ”关系。表示同类事物之间的对比,常译作“然而,可是 ”。while 的另外两个重要的含义:①while 作从属连词,意为“当⋯⋯ 的时候 ”。②while 作从属连词,意为“虽然,尽管 ”,表示让步关系。(2012 ·四川高考 )At school , some students are active________some are shy,yet they can be good friends with one another. A.while B.although C.so D.as 5.undertake vt.(undertook ,undertaken)着手;从...