In times of crisis, true leadership is defined by the ability to make tough decisions with clarity and conviction.

The historian is a prophet in reverse.

L-函数的算术是探索宇宙隐藏模式的旅程。

The march of invention has clothed mankind with powers of which a century ago the boldest imagination could not have dreamt.

没有充足的食物供应，今天所知道的文明就不可能进化，也不可能生存。