短语表达

1.build up (建立;增强;增加)

2.come across (穿过，出现;遇到)

We are bound to come across difficulties， but we are determined to overcome them.

3.look up (查阅)

4.at top speed (以最高速度)

5.depend on (依靠;取决于)

6.make sense (有意义、讲得通)

7.try doing sth(尝试做某事)

8.come up with (提出，想出;提供)

9.lead to(导致)

10.after all (毕竟)

11.provide with (提供)

12.begin with (以……开始)