粒子的概念只是一个近似,在经典极限下有效。
The past is always changing. It is not fixed. The past is not stable.
To write is to give voice to the voiceless.
我们必须保持警惕,坚决与一切内外敌人作斗争。
越是超现实,我越喜欢。
When we hate someone, we hate in his image something within ourselves.