化学的进步以新元素的发现及其性质的测定为标志。

There is only one good, which is knowledge, and one evil, which is ignorance.

The only thing that is truly yours is your dreams.

控制愤怒的情绪如同摧毁山峦般坚毅，又如救火一样迅疾；压制欲望如同填塞山谷一样有毅力，又如防洪一样果断。