Sustainability is not an option, it's a responsibility.

刀展示了锋利，而试刀砍头的人将遭到不祥。 

The deeper you go into mathematics, the more you realize how much remains unknown.

终点总是比你想象的更近。

我画我喜欢的东西，在我喜欢的时候，在我喜欢的地方。