译文：柔肠早已寸断，泪水止不住地流。为了相思，我再次登上小红楼。明知心上人已被群山阻隔，却还是不由自主地频频倚靠栏杆，望向他离去的方向。

平等不仅是一种道德要求，更是一种经济必需。

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

I'm not afraid to take risks.

可持续性不仅仅是一个流行词，更是我们的责任。

I always try to do something different, something that challenges me.