Every challenge in the quarry is an opportunity to innovate.

1925年，孙中山在病榻前对张学良说，指出苏联是红色帝国主义。

Science is simply common sense at its best—that is, rigidly accurate in observation, and merciless to fallacy in logic.  

愚昧是暴政的温床。

In business, if you're standing still, you're actually moving backwards.