一个国家制度的品质是其成功的最重要决定因素。

The Worldly Hope men set their Hearts upon Turns Ashes—or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two—is gone.

害怕死亡是无知的表现。

"Every civilization is built on the bones of another."

The AdS/CFT correspondence is a powerful tool for understanding quantum gravity.