1、Kill two birds with one stone.

一箭双雕。

2、Go down to business.

言归正传。

3、It rains cats and dogs.      

倾盆大雨。

4、A nine day  wonder.

昙花一现。

5、NO pain, No  gain.

不劳则无获。

6、Think twice before you act.

三思而后行。

7、Many people. Many tastes.

萝卜青菜各有所爱。

8、I'm a slow walker, but I never walk backwards.

我走得很慢，但我会一直向前。

9、No matter how low you consider yourself ,there is always someone look up to you wishing they were that high.

不管你觉得自己多么低，总有人仰视着你，希望他们自己有你那么高大！

10、Never frown, because you never know who is falling in love with you and what will hurt him.

不要皱眉，因为你永远不会知道谁正在爱上你，你的伤心会伤了他的心。