作者：吕建忠
1. to ones cost 吃了苦头之后才......;由于付出代价才......
-"Sunlight always comes after wind and rain, be confident and see things through to the end." I know it to my cost.
-Such is life!
--"不经历风雨，怎么能见彩虹。"这是我在吃了苦头之后才知道的。
--生活就是这样！
2. as easy as pie极其容易
-We all think studying English is as easy as pie. Do you think so?
-I dont agree with you. Its very diffcult for me.
--我们大家都认为学英语很容易。你这样认为吗？
--我不同意。对于我来说太困难了。