每回收一吨纸就能拯救17棵树，这不仅是生意，更是留给后代的遗产。

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil, no good, nothing but blind, pitiless indifference.

最成功的企业解决了人们甚至不知道自己存在的问题。

The best way to learn mathematics is to do mathematics.

“唯一真正强大的是人类精神。”