The future of fishing depends on balance—between economic needs and ecological limits.

数学中的每一个问题都是学习新东西的机会。

设计师最强大的工具是有能力说“不”。

Those who make peaceful revolution impossible will make violent revolution inevitable.

在科学中最令人兴奋的短语，预示着新发现的，不是“我发现了！”，而是“这有点奇怪……”

I don't make music for the radio; I make it for the soul.

Every improvement in the circumstances of the society tends either directly or indirectly to raise the real rent of land, to increase the real wealth of the landlord, his power of purchasing the labour, or the produce of the labour of other people.