在数学中，最简单的问题往往能引出最深刻的见解。
In mathematics, the simplest questions often lead to the deepest insights.
The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.
我热爱音乐的神秘感。
可持续性不是一种选择；而是我们对后代的责任。
Lisp语言被设计成可扩展的，很容易为其添加新功能。