Mathematics is not a spectator sport. You have to do it to understand it.
关键是不断进步,不断奋斗,不断相信。
如果你想要帮助别人,告诉他们真相。如果你想帮助自己,告诉他们他们想听的。
The beauty of astronomy lies in its ability to connect us to the vastness of the cosmos.
小说应该是一本问题的书,而不是答案的书。