我们始终坚持以用户为中心，不断优化产品和服务。

The struggle of man against power is the struggle of memory against forgetting.

All men are immortal， but those who are not educated are immortal in a lower and less enviable sense.

Memory is a tricky thing. It's not always reliable, but it's all we have.

智慧是对痛苦的理解，对喜悦的感激，以及对过去的接受。