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1、Unit4 Life on Mars1. dried food dry adj.干燥的 v.（使）变干2. planet 行星 the Earth, the Moon, Mars3. polluted adj.被污染的pollute v.污染 pollution n.污染 Rubbish pollutes the river. The river is polluted. There is so much air pollution in the city.4. rapid adj.快的，迅速的 rapidly adv.快地，迅速地 The Earth is becoming more and
2、 more crowded and polluted because of the rapid increase in population.The population on the Earth is still increasing rapidly.5. at a/the speed of.The car is moving at a/the speed of 100 kilometres per hour.6. comfort n.舒服；舒适（不可数）v.安慰 comfortable adj.舒服的，舒适的 uncomfortable adj. 使人不舒服的，不舒适的My best fr
3、iend comforts me when I am sad.It is a comfortable bed.The shoes are uncomfortable.7. in the form of.以.形式 Food would most probably be in the form of pills and would not be so tasty.8. taste v.尝起来 n.味道 tasty adj.味道好的 The fish tastes nice. I dont like the taste of durian.9. special adj.特殊的，特别的 special
4、ly adv.专门地，特地10. compare vt./vi 比较，把.比作compare to/with 与.相比Compared with life on the Earth, life on Mars would be better in some ways.We compare teachers to candles.11. challenge v./n. 挑战 challenging adj.挑战性的 Life on Mars would be interesting as well as challenging.as well as “不但.而且，既.又.”。注意这一短语在译成英
5、语时应先译as well as 后面的内容，再译前面的。如：They visited the museum as well as the zoo. 他们不但参观了动物园，还参观了博物馆。 I like a big challenge. I challenged him to a game of chess.我向她挑战，要跟他下一盘棋。12. aware adj.知道，意识到 be aware of.Tom has been aware of the importance of safety.13.possible adj.可能的 impossible 不可能的 possibility n.可能
6、性14.alien n. 外星人 an alien15.strange adj.奇怪的；陌生的 stranger n. 外来者，陌生人16.doubt n./v. 怀疑 There is no doubt that he is an excellent teacher. I doubted whether he would be the best man for the job.17. carry out 开展，执行 He will carry out his plan.Our government will carry out a new policy.18. risk n. 风险，危险 v
7、.冒风险；冒险做 take the risk of.冒（做某事）的危险 risk doing sth. 冒险做. He took the risk of stealing the ladys wallet. 他冒险偷了这个女士的钱包。 They were willing to risk losing their jobs. 他们愿意冒失业的危险。19. after all 毕竟20. electronic adj.电子的 electronic products/goods21. -Ive never thought about traveling into space.-Me, neither
8、./Neither have I.22. It is hoped that people could start all over again and build a better world on Mars.人们有望能够在火星上重新开始，建设一个更好的世界。23. Here is what life there could be like.这里描述的是火星上的生活可能是什么样子。句中what life could be like 作谓语动词的表语。24. At present, our spacecraft are too slow to carry large numbers of pas
9、sengers to Mars-it would take months. 目前，我们的宇宙飞船太慢了，无法运送大批的乘客去火星-因为要花费几个月的时间。large numbers of.表示“大量的”，也可以说a large number of.Large numbers of /A large number of people go travelling during the National Day holiday.很多人在国庆假期去旅游。25. With the development of technology,by the year 21000,the journey might
10、only take about 20minutes in spacecraft that travel at the speed of light.随着技术的发展，到2100年，乘坐以光速飞行的宇宙飞船，行程或许只要大约20分钟。26. The gravity on Mars is only about three-eighths of that on the Earth.27. Every student would have a computer at home connected to an interplanetary network.作定语，修饰前面的computer.28. How
11、 do you like life on Mars?=What do you think of life on Mars?29. -What will it be like to live on Mars?-Theres less gravity on Mars.30. Human cannot survive without water,oxygen or food.31. People would have to wear boots that are specially designed to prevent themselves from floating off in space.32. Are scientists in agreement that living on Mars would be possible for humans in the future? reach agreement达成协议33. Here is a guide to living on Mars in the future.34. If you want to drive, you can buy a car which flats in the air.35. Im not sure if its worth the risk.4学科网（北京）股份有限公司
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