AdS/CFT对应是理解量子引力的有力工具。

The mining industry must evolve to meet the demands of a changing world, or it will be left behind.

The only real prison is fear, and the only real freedom is freedom from fear.

History does not repeat itself, but it recurs in different forms.

你的月亮无法发光是因为我。

我们唯一需要害怕的就是害怕本身。