【译文】走路遇到危险处尚能回避一下，麻烦事临到头上就由不得自己了。
Once you understand how to write a program get someone else to write it.
粒子的概念只是一种近似，仅在特定极限情况下有效。
The best way to predict the future is to create it.
The greatest discovery of any generation is that a human being can alter his life by altering his attitude.