种一棵树最好的时间是20年前，第二好的时间是现在。

没有大胆的猜测，就没有伟大的发现。

永远不要低估一个执行得当的简单想法的力量。

Our descendants will achieve things that will amaze us， yet a portion of what they will create could have been made with today’s materials and tools if we had had the imagination. Think bigger.

我不是女孩，还不是女人。