当人微笑时，世界爱了他。当他大笑时，世界便怕他了。

The process of scientific discovery is as important as the discovery itself, for it teaches us about the nature of inquiry and the limits of our understanding.

农业中的每一个挑战都提供了学习和成长的机会。

We don't inherit the earth from our ancestors; we borrow it from our children.