可持续林业不仅仅是砍伐树木；它关乎我们星球的未来。

如果你想有所作为，就必须愿意承担风险。

People are unreasonable，illogical and self-centered；Love them anyway.If you are kind，people may accuse you of selfish，ulterior motives；Be kind anyway.If you are successful，you will win some false friends and some true enemies；Succeed anyway.The good you do today will be forgotten tomorrow；Do good anyway.If you are honest and frank，people may cheat you；Be honest and frank anyway.People favor under dogs but follow only topdogs.Fight for a few underdogs anyway.What you spend years building may be destroyed overnight；Build anyway.If you find serenity and happiness，they may be jealous；Be happy anyway.People really need help but may attack you if you do help them.Help people anyway.Give the world the best you have，And it may never be enough；Give the world the best you have anyway.You see，in the final analysis，it is between you and God；It is never between you and them anyway.

The end of history will be a very sad time.

The ground floor is where the city and the building meet - it's the most important level.

图灵机和现代计算机之间有什么区别？这与希拉里（Hillary）登上珠穆朗玛峰（Everest）和在高峰期建立希尔顿酒店之间的过程相同。

荒野是一个美丽而危险的地方。要生存，你必须尊重两者。