Virtue is more to be feared than vice， because its excesses are not subject to the regulation of conscience.

森林不仅仅是一种资源，更是我们留给后代的遗产。

Every performance, I treat it as the last one.

我不完美，但我一直在努力变得更好。

The PAC learning framework provides a formal way to quantify the learnability of a concept class.

写作是一种爱的行为，是我们献给世界的礼物，是一种说“我在这里，这就是我”的方式。