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。
我读一本无聊的书睡着了,梦见我继续读着,所以我因纯粹的厌倦而醒来。
Fairy tales are more than true: not because they tell us that dragons exist, but because they tell us that dragons can be beaten.
一个组织的诚信质量决定了其信任的质量。
The idea of a multiverse is a natural consequence of the inflationary universe model.