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Unit 4 Global warming
Word usage:
1. phenomenon n. pl phenomena fact or occurrence, especially in nature or society, that can be perceived by the senses
1) An eclipse of the moon is a rare phenomenon.
2) Bankruptcy is a common phenomenon in an economic recession.
2. per prep.(used to express rates,prices,etc)for each(unit of time,length,etc)
1) Rooms cost £50 per person, per night.
3. glance vi. look quickly at (sb./sth.) n. a quick look
glance at = take a glance at 匆匆一看；扫视
stare at 盯着看；凝视
glare at 瞪着眼看；怒目而视；怒视
1) She glanced shyly at the young fellow from behind.
2) They stood glaring at each other as if they were enemies.
4. decrease vt.&vi. become smaller or fewer;diminish;reduce
decrease/reduce…to/by…减小，降低到（了）；反义increase
1) Student numbers have decreased by/to 500.
2) Interest in the sport is decreasing.
5. steady adj. developing, growing, etc. gradually and in an even and regular way; not changing and not interrupted; firmly fixed supported or balanced; (of a person)sensible, who can be relied on; steadily adv.
1) We are making slow but steady progress.
2) I have a steady job in this city.
3) Such fine work requires a good eye and a steady hand.
4) He is a steady young man/work.
5) The company’s exports have been increasing steadily.
6. exist vi. to be present in a place or situation; to live,especially in a difficult situation or with very little money.
existence n.存在 生存 came into existence产生
1) Does life exist on other planets?
2) Few of these monkeys still exist in the world.
3) Pakistan came into existence as an independent country after the war.
Useful expressions:
1. supply sb. with sth. = supply sth. for/to sb.提供/供应某物给某人
provide sb. with sth. = provide sth. for sb.
offer sb. sth. = offer sth. to sb.
1) The school supplies books for/to the children.
2) We are here to provide a service for the public.
2. compare…to…把……比作
compare…with…把……和……比较
compared with/to与……相比（在句中常作状语）
compare with与某人/物相比
1) People often compare children to flowers.
2) If you compare her work with his,you’ll find hers is better.
3) Compared with/to many women, she was indeed very fortunate
4) This can’t compare with that.
3. come about发生come across偶然遇到come out出版，（花）开
Please tell me how the accident came about,I’m still in the dark.
4. build up 树立，逐步建立；增加；增进（健康）；集结
build up one’s health增进健康 build up a good reputation/fame树立良好的声誉；Traffic is building up.车辆在增多
1) This built up my hope after the interview.
5. keep on sth/doing sth 继续/坚持做某事 表动作的反复，有停顿
keep doing sth一直不断地做某事 表动作的持续，无停顿
1) Though it was raining, they kept on working until it was finished. 2) I kept standing in the train all the way.
6. on the whole = in the main =in the abstract大体上，基本上，总的来说
as a whole总体上，作为一个整体看待
1) On the whole, I am in favor of the idea.
7. make a difference有关系，有影响，有重要性
make some/no/any/not much/a great deal of difference（to…）颇有/没有/有些/没有多大/有很大影响（关系）
1) The rain didn’t make much difference to the game.
2) It makes no difference whether you go today or tomorrow.
8. make sense (of)有道理；有意义；讲得通；明白；是明智的
1) This sentence doesn’t make sense.
2) Can you make sense of the poem?
3) It makes sense to buy the most up-to-date version.
9. put up with = stand = bear = stand for忍受， 容忍
1) We had to put up with the inconvenience.
10. so long as = as long as 只要；既然,由于
1) You may borrow the book so long as you keep it clean.
2) So long as there is a demand for these drugs, the financial incentive for drug dealers will be there.
11. up to as many as 多达;up till直到;胜任;正在干,从事着
1) I can take up to four in my car.
2) Up to now he has been very quiet.
3) He’s not up to the job.
4) What’s she up to?
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