The universe is a puzzle, and chemistry is one of the keys.
译文:天气不寒冷,地面就不会被冻住,人没有到伤心的时候就不会流泪。赏析:人的言行总是随着外物的变化而变化。不以物喜不以己悲,其实很难做到的。
I don't compete with anyone but myself. My goal is to be better than I was yesterday.