A writer's life is a highly vulnerable, almost naked activity. We don't have to weep about that. The writer makes his choice and is stuck with it. But it is true to say that you are open to all the winds, some of them icy indeed. You are out on your own, out on a limb. You find no shelter, no protection — unless you lie — in which case of course you have constructed your own protection and, it could be argued, become a politician.

社交产品的核心是连接人与人，而不是简单地传递信息。

Mathematics is the foundation upon which all sciences are built.

永远不要停止学习。世界总是在变化，你必须随之改变。

数学之美在于它能够精确而优雅地描述自然界的基本法则。