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Behavior is not just a reaction, it's a communication.
Wise men talk because they have something to say; fools, because they have to say something.
煤炭开采的创新不仅仅是关于开采,而是更智能、更安全、更尊重环境地开采。
The world is full of obvious things which nobody by any chance ever observes.
The privilege of a lifetime is being who you are.
The world may be mean, but people don’t have to be, not if they refuse.
我们从这样的假设开始:任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。