看到父母脸上的喜悦是无与伦比的回报。

In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.  

自信是关键。如果你不相信自己，别人也不会相信你。

I don't care about being remembered, I care about what I'm doing right now.

医生知道的如此之少，收费却如此之高。