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As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.
物理学的美丽在于它能够用最深刻的理论解释最简单的现象。
我做事情不是为了得到反应或批评,我是为了长远的坚持。
The greatest weapon against stress is our ability to choose one thought over another.
如果你在尝试改变世界,那么你正在做真正重要的事情。相信你每天都会在兴奋中起床。