右手画圆，左手画方，不能两成
用右手画圆形，左手画方形，不能同时画成
穷人的生活故事是用尖锐的笔写在他的身体上的。
Happiness is not a destination, it's a way of life.
The past is never dead. It's not even past.
A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.
If you're not failing occasionally, you're not pushing boundaries hard enough.
我们站在巨人的肩膀上，他们首先将地球想象为一个动态系统。