可持续性不是一种选择；它是农业未来的必需品。

In republican governments, men are all equal; equal they are also in despotic governments: in the former, because they are everything; in the latter, because they are nothing.

现在是过去的钥匙，但过去也可能掌握着未来的钥匙。

It is better for you to be free of fear lying upon a pallet, than to have a golden couch and a rich table and be full of trouble.

面包师的手是他最重要的工具。

数学的力量在于它简化复杂事物的能力。