居身平安之境要考虑危难之时，处身太平盛世要想到乱世之日。
现代林业必须平衡三个轴心：生态、经济和道德。
Character is destiny.
PAC学习框架提供了一种正式的方法来分析学习算法的效率和有效性。
To write is to give voice to the silenced.
To write is to confront the ghosts of our past, to give them a voice, and perhaps, to set them free.
写作就是面对我们过去的幽灵，给它们一个声音，也许，让它们自由。