土地是一种独特的生产要素，其供给是有限的。
A man without a homeland is like a nightingale without a song.
When someone makes a decision, he is really diving into a strong current that will carry him to places he had never dreamed of when he first made the decision.
适应是心智最伟大的成就。
可持续性不仅仅是一个流行词，它是长期成功的基础。
If we don't change direction, we'll end up where we're headed.
As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.