选修八Unit2 知识点Ⅰ单词1.differ :vi 不同，相异；意见不合differ from : 与…不同differ in : 在…方面不同differ with sb on/about sth :与某人在某事上意见不同be different from :不同于be different in : 在…不同make a/no difference （to）: 有/无关系（影响、作用）①中文与英文在许多方面不同。
Chinese English many different aspects.②The husband differs his wife who is to take charge ofthe money.③﹙与我无关﹚ whether you are going to stay.2.undertake :v 从事，承担，负责，保证（undertook,undertaken）Undertake a task/responsibility :承担任务/责任Undertake to do sth : 承诺/答应/着手做某事Undertake that : 保证…① She ﹙将负责组织工作﹚of the whole project.② I ﹙保证一周内还钱﹚③ The travel agent ﹙保证你会喜欢这次旅行﹚.3 object :vi 反对；不赞成，抗议N 物体，目标，对象Objection ：n 不赞成，反对，异议Objective ：adj 客观的;基于事实的Object to sb/sth :反对，抗议…Object that ：抗议…Have an/no objection to (doing) sth : (不)反对…Raise a storm of objections ：引起一阵强烈的反对 There is no objection to sth :没设么不可以的①犀利哥是同情的对象。
Brother sharp .②母亲反对说,吉米身体太虚弱,不能承担那份工作.Mother objected .③我们反对因为一个人的错误而惩罚整体.We for one person's fault.④他反对我提出的建议。
He .4 obtain : v. 获得;赢得①他没有获得奖学金.He failed to .obtain/acquire/gain/earn/achieve/get①我终于设法弄到了这个报告的副本I finally managed to a copy of the report.②我们应该努力养成好习惯。
We should try to good habits.③他发现赚点额外收入很容易。
He found it easy to extra money④然而，只有共同奋斗才能实现目标But we can only together⑤上星期天你收到我的电报了吗 ?Did you my telegram last Sunday ?5.altogether : adv①完全地 (用于否定句中表部分否定)他对自己的新房子不尽满意。
He his new house .②全部，合计 (in total)I spent ￡ 100 on the present.③总之，the meeting was a success.6 .Owe : vt 欠(账，钱，人情等)；把…归功于Owing ：adj 未付的，欠的Owe sb sth =owe sth to sb欠某人某物Owe …to …欠…；把…归功于Owing to…因为，由于①你欠我一个礼物。
You owe me a present.②体育课因雨取消了。
, PE class was cancelled .③Jack (认为他的成功更多是靠运气而不是靠能力)7 bother vt. 烦扰;打扰; vi.操心;麻烦;n.麻烦,麻烦的事;引起麻烦的人或事bother sb. with/about sth. 为某事打扰或烦扰某人bother to do ... 费力做……bother with/about sth. 操心做某事It bothers sb that/ to do sth 做某事使某人不安①我不能因为自己那点小事就去打扰他I can't my little affairs.②你不必特地来我办公室.You needn't to my office。
③那问题已经困扰了我几个星期.The problem me for weeks④别为我担心⑤我毫不费力地找到了那座房子.I found the house .8 strike : v 打，击；突然想到；罢工；(钟)敲/鸣；划(火柴)；(灾难，疾病)侵袭，爆发；It strikes sb …某人突然想到…(sth strikes sb)Be/go on strike :罢工Strike …into one's heart :使…刻骨铭心①当我路过的时候，钟敲12点。
When I was passing by, I .②我突然想起我没关煤气。
.③趁热打铁。
.④非典袭击了那个地区。
9 resist v.抵抗;对抗resistance n. 抵抗,反抗;抵抗力resistant adj. 抵抗的,有抵抗力的resist sth. 抵制;阻挡某事resist doing sth. 反对做某事can't resist doing sth. 忍不住做某事be resistant to sb./sth. 对某人/某事有抵抗力①健康的身体能抵御疾病A healthy body②我忍不住要笑③这种作物具有抗寒性.This plant cold weatherⅡ词组1.Pay off ：偿清债款；得到好结果；付清工资解雇①最后，他的努力得到了回报At last, .②你的计划成功了吗？pay for ：为…付款；为…付出代价Pay back ：还钱；报复Pay a/the price for : 因…受害/付代价①fter ten years of hard working she finallyher debt.②Our efforts are sure to .③Have you the milkman this week?④I will you next week.2 cast down :使沮丧；使不愉快Cast out：驱逐；赶走Cast off ：抛弃；摆脱掉①He for several days after he heard the bad news.②You really must all these bad habits.3 in favour of : 赞成；支持Do sb a favour=do a favour for sb 帮某人忙In sb's favour :对某人有利Be in/out favour with sb : 有（没有）某人的好感/支持①我赞成现在停止的工作I now.②目前她没有媒体的支持She the media just now.③这一决定对他有利The decision went .4 (be) bound to (do) : 一定或注定（做）①按照合同规定，你必须在月底前付款。
You before the end of the month.Be bound up to sth 忙于某事；热衷于某事物Be bound up with sth 与某事物关系密切Be bound for 去；准备去5 in vain 白费力气，枉费心机我们的所有努力都付诸东流了。
All our efforts .6 in good/poor condition 情况/状况很好/很坏①此船的现状不适宜远航The ship to make a long voyage.In condition 健康状况良好Out of condition 健康状况不佳In…condition 处于…状况On condition that 在…条件下，如果On this/that condition 在这个/那个条件下On/under no condition 无论如何都不，决不①they agreed to lend us the car (条件是)we returned it before the weekend .(condition)②我们绝不在公共场所抽烟On no condition .7 have a(n)…impact on…对…有…影响①本拉登的死对美国有影响。
The death of Bin Landen ."影响"表示法：Affect sb/sth :影响…Have/exert a(n)…influence on…对…有…影响Have a(n)…effect…on 对…有…影响Have/make a(n)…impact on 对…有…影响8 open sb's eyes to sth 使某人看清或意识到某事；使某人长见识或开眼界旅游真的使人开阔眼界Travelling really .Ⅲ句子1 cloning plants is straightforward while cloning animalsis very complicated.克隆植物简单，但克隆动物非常复杂。
While在句中作并列连词，作“然而”解，连接并列分句，表示前后意义上的对比。
注意，此时while放在第一分句或第二分句前均可。
While作连词的用法①作并列连词，意为“而，却”，表对比②作从属连词，引导时间状语从句，从句谓语是延续性动词③作从属连词，引导让步状语从句，表示“尽管”eg① I admit his good points，i can see his bad ones.A BecauseB IfC OnceD While② some people come here for a short break, othershave decided to stay forever.A BecauseB IfC OnceD While③Mary made coffee her guests were finishingtheir meal.A so whatB althoughC whileD as if2 Altogether Dolly lived six and half years, half the lengthof the life of the original sheep.多莉总共活了六年半——其原型羊寿命的一半。