从我们记事起，妈妈就是一个中年妇女了，可谁又知道，她也曾是个花季少女。

Mathematics is a collaborative endeavor. No one does it alone.

Success is not about how much money you make, it’s about the difference you make in people’s lives.

我们必须在经济增长和生态保护之间取得平衡——别无选择。