我喜欢狗。你总是知道狗在想什么。它有四种情绪：开心、难过、生气和专注。

学习数学的唯一方法就是做数学。

The more we know, the more we realize how little we know.

When I am abroad， I always make it a rule never to criticize or attack the government of my own country。 I make up for lost time when I come home.

The best products come from a combination of passion and precision.