7. in scientific research 在科学研究上

8. examine a new scientific idea 验证一个新的科学思想

9. draw a conclusion 得出结论

10. analyze the results 分析结果

11. a well-known doctor 一个著名的医生

12. ordinary people 百姓;普通人

13. expose (...)to sth. 暴露(.....)在......中

14. the most deadly disease 最致命的疾病

15. terrified people 被吓坏的人们

16. get interested in sth./doing sth.对...产生兴趣

17. absorb sth. into... 把....吸收入....

18. gather the information 收集信息

19. determine to do sth. 决心干某事

20. a valuable clue 一条珍贵的线索

21. the water pump 水泵

22. in addition (to...) 除......之外还有......

23. link ... to ... 将...和...联系起来 (be linked to...)

24. have it delivered (have sth. done) 叫某人送东西

25. die of... 死于...

26. announce with certainty 肯定地宣布

27. polluted water 被污染的水

28. prevent sb. from doing sth.阻止某人干某事

29. deal with... 处理......

30. solve the problem 解决难题

Expressions & Phrases (2)

1.come to an end 到了尽头

2.find the cause of this illness 找出疾病的起因

3.look into... 调查......

4.apart from...除...之外;此外 (=except for, besides)

5.prepare for... 预备好....

6.be strict with sb. 对某人严格要求

7.a revolutionary theory 一个革命性的理论

8.lead to... 通向.... ;导致... (注意:to为介词)

9.make sense 有意义

10. at times =sometimes 有时候

11. contribute to sth. 有助于;促进

12. encourage sb. to do sth. 鼓励某人做某事

13. point of view 观点

14. living conditions 居住条件

15. break... in/into pieces 把...摔成碎块

16. be devoted to sth./sb.专致于.; 关心;挚爱...

17. devote one's life to doing sth. 献身于.....

18. curved line 曲线

19. achieve great success 取得巨大的成功

Step IV. Language Points

1.discover & invent

discover v. "发现" 被探索或被揭示的事物早已客观存在着.

Eg. 1)Columbus discovered America in 1492.哥伦布于1492年发现了美洲.

2) Who discovered radium? 谁发现了镭?

invent v. "发明",指的是发明原先不存在的东西.

Eg. Who invented the steam engine? 谁发明了蒸汽机?

2. Who invented the way of giving electricity to everybody in large cities? 是谁发明了把电带给大城市中的每个人的办法?

the way of doing sth.= the way to do sth ... "做.....的方法"

She showed us the way of cleaning it.= She showed us the way to clean it.

她教给我们清洗它的办法.