Everything is possible, and nothing is given.

Nature has been the greatest chemist of all time, and we are just beginning to understand its secrets.

质量从来不是偶然的；它始终是智慧努力的结果。

I could easily forgive his pride, if he had not mortified mine.

如果学习，不能够做到专心，这样就会变得杂乱无章。

不要每天吃饱整日无所用心，也不要舍弃每一分一秒的时光。