粒子的概念只是近似的，并且只有在动量较小的极限下才有意义。

Collaboration is the key to unlocking creativity and driving innovation.

晏子春秋

释义：世间万物的发展变化都由命运决定，人力难以控制分毫。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

一个良好的世界需要知识、善良和勇气；它不需要对过去的后悔，也不需要被无知之人长时间前说过的话所束缚的自由智慧。