I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

火药的不可控性教会我接受不完美。

数学是上帝用来书写宇宙的语言。

我是个完美主义者，但我学会了放手。

追求科学不仅仅是追求理解，更是追求奇迹。

"We are all in the gutter, but some of us are looking at the stars."