"I am convinced, from my conversations with General Stanley McChrystal and I'm grateful to him for the time he gave me there and even on the telephone since he understands the necessity of conducting a smart counterinsurgency in a limited geographic area,".

VOA: standard.2009.10.26

And he convinced me that they actually could fly.

然后他说服我说，企鹅其实是能飞的。

I used to实战 - SpeakingMax英语口语达人