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hat a person begins to look sick.只有當(dāng)這種病毒發(fā)長(zhǎng)成艾滋病時(shí),人才會(huì)顯出病態(tài)。 Unit 4 Global warmingI. Phrases 1. global warming 全球氣候變暖 2. a supply of /supplies of 大量的 3. depend on 依靠4. human activity 人類活動(dòng) 5. a natural phenomenon 自然現(xiàn)象 6. be trapped in... 被困在…… 7. a quantity of/quantities of + n. 大量的 8. result in 導(dǎo)致.. result from 原因是.. 9. as a result = in consequence 因此as a result of =in consequence of 由于…的緣故 10. build up 逐漸建立 11. keep on 保持 12. make a difference 有影響;有關(guān)系make no difference 對(duì)……沒有影響;不重要 13. put up with… 忍受 14. as/so long as 只要 15. and so on 等等 16. glance at… 很快地看……一眼.. 17. on the whole 大體上 18. pare…to.../pare….with 與…相比 19. e about 發(fā)生(不及物)e across偶遇。穿過e back回來e down降下。減低e in進(jìn)來。到達(dá)e out出來。出版e up上來。被提出討論。發(fā)芽e up with追上。趕上e to 結(jié)果達(dá)到。蘇醒 20. heat up 受熱 21. up to 多達(dá)。 比得上 22. in the years ahead 今后一些年里 23. carry out 執(zhí)行 24. decrease by 下降了……decrease (from …) to (從……)下降到 25. greenhouse effect 溫室效應(yīng) II. Sentences1. That probably doesn’t sound very much to you or to me but it is a rapid increase pared to most natural changes.這對(duì)你我來說很可能是無所謂的,但是跟多數(shù)自然變化相比較而言,這卻是一種快速的增長(zhǎng)。2. There is no doubt that the earth is being warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon.毋庸質(zhì)疑的是地球正在變暖,但關(guān)于它變暖的原因是由于人類活動(dòng)所致還是一種自然現(xiàn)象還存在激烈的爭(zhēng)論。3. Without the “greenhouse effect”, the earth would be about thirtythree degrees Celsius cooler than it is.如果沒有這種 “溫室效應(yīng)”,地球的溫度將比現(xiàn)在的溫度還要低33攝氏度左右。4. Some people think future global warming would cause the sea level to rise by several meters。 others predict severe storms, droughts, famines, the spread of diseases, and the destruction of species.有人認(rèn)為全球變暖會(huì)導(dǎo)致海平面上升好幾米。也有人預(yù)言會(huì)出現(xiàn)嚴(yán)重的風(fēng)暴、干旱、饑荒、疫病和物種的滅絕.5. It is the greenhouse effect that gives the earth’s surface the average temperature of 15℃ .溫室效應(yīng)使得地球表面的平均氣溫達(dá)到了15℃.6. Together, individuals make a difference. 眾人拾柴火焰高。7. Your contribution counts. 你的貢獻(xiàn)很有價(jià)值。 Unit 5 The power of natureI. Phrases 1. a volcano erupting 一次火山爆發(fā) 2. an active / a live volcano 活火山 3. pare…with / to… 把……和……進(jìn)行比較pare…to… 把……比作…… 4. imagine doing sth. 設(shè)想做某事 5. take risks / a ri