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1、Unit2 Cloning1.differ vi 相异，有区别A and B differ from each otherA differs from BFrench differs from English in this respect方面.differ with sb. about/on/over sth.(意见相左，持不同看法，不同意)I have to differ with you on that.be different from; differently; difference2.share sth. with sb.3. arise(arose,arisen) vi产生，发生
2、，出现A new crisis has arisen.A storm arose during the night.4. exact adj. 精确的，准确的time exactly adv.to be exact确切地说Shes in her mid-thirties-thirty-six to be exact.not exactly (1)根本不，决不，一点儿也不 He wasnt exactly pleased to see us.(2)（纠正对方刚说过的话）不完全So he told you youd got the job? Not exactly, but he said the
3、y were impressed with me.5.straigthforward adj. 简单的，易懂的，坦诚的，坦率的a process6.undertake vt.着手，从事，承担a task/project vi承诺，允诺，答应 to do sth.He undertook to finish the job by Friday.He soon realized that the task he had undertaken was beyond him.7.pay off 得到好结果，取得成功，偿清 We paid off our loan after 15 years. Did
4、 his plan pay off?make/achieve a breakthrough作出/取得突破性进展on (the) one hand, on the other hand8. cast (cast cast)vt.投，掷，扔be cast down（因某事）沮丧，不愉快 She was cast down by the marks she got in the exam.9.correct vt.改正，纠正，批改adj. 正确的，准确无误的correction n.改正，纠正，修正make a correction 作出一项更正10object n. 物体，物品，东西， （研究的）
5、对象，目标，宾语vi. 不同意，反对，不赞成object to sb./sth.object to doing sth.=object to sb. doing sth.Many local people object to the building of the new airport.I really object to being charged for parking.objective adj. 客观的11. forbid vt.禁止，不准forbid sb. to do sth.forbid doing sth.forbid sb from (doing) sth.禁止（做）某事My father forbade me to watch the television.He was forbidden to leave the house, as a punishment.The Forbidden City紫禁城advise, forbid, allow, permit用法相同12.accumulate vt. 积累I have accumulated a lot of books.vi.(数量)逐渐增加，（数额）逐渐增长Debts began to accumulate.13. be in favor of 赞成，支持