1. be found in－被发现的
2. be associated with－与
3. be typical of－是典型的
4. the use of－使用
5. rely on－依靠
6. be derived from－来自
7. refer to－参见
8. be known as sb－被称为某人
9. be known for sth－为某人所熟知
10. be concerned with－关注
11. in relation to－有关的
12. act on－采取行动
13. bring about－带来
14. protect.... from－保护的…从
15. together with－在一起
16. a number of－一个数
17. be able to－能够
18. be similar to－类似于
19. be dependent on－依赖
20. with ease 熟练的－轻松熟练的
