中心地的等级越高，其数量越少，影响范围越大。

真相会让你自由，但首先它会激怒你。

All men are immortal， but those who are not educated are immortal in a lower and less enviable sense.

可持续性不仅仅是一个流行词，它是负责任林业的基础。我们必须在经济增长和环境管理之间取得平衡。

Every setback is a setup for a comeback.

The balance of marine ecosystems is our shared responsibility. Destroying it means destroying our own future.

The steel industry must embrace sustainability or risk becoming obsolete.

In theory, there is no difference between theory and practice. But, in practice, there is.