The true value of a forest can never be measured in board feet alone.

世界之美在于其人民和文化的多样性。

投资于更清洁的能源解决方案不仅对环境有益，对企业也有益。

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.

The world is very, very beautiful if you look at it, but most people don't look very much.

始终对研究的局限性保持透明。