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

我不考虑年龄。我考虑的是人们的精神和能量，以及他们是否积极乐观，是否有趣相处。

The past is never dead. It's not even past.

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

真正的文学应该能够改变读者的生活。