计算理论不仅仅是关于解决问题，还涉及理解可计算性的极限。

The more acute the experience, the less articulate its expression.

永远努力在你的生活之上保留一片天空。

Every generation imagines itself to be more intelligent than the one that went before it, and wiser than the one that comes after it.

足够爱自己，才能设定界限。