过去和未来一样，都是不确定的，只存在于可能性的光谱中。
The past, like the future, is indefinite and exists only as a spectrum of possibilities.
永远不要停止学习，世界总是在变化。
数学之美在于它能够精确而优雅地描述自然界的基本法则。
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.
Quality should never be compromised for speed in pharmaceutical production.