In some cases, the back of the head could be more expressive than the front, in which case this is your opportunity and I wish you luck.

有些时候,后脑勺确实比正脸更有表现力,这才是你们的机会,祝你们好运

耶鲁公开课 - 基础物理课程节选

And I had done well, so I knew that I had a good chance of getting into graduate school,

我的表现也不错，所以，我知道我有很大的机会被研究生院录取，

图书馆经常人很多 - SpeakingMax英语口语达人