If you want to understand a system, try changing it.

跨国合作是保护海洋生态系统的关键。

The secret of being miserable is to have leisure to bother about whether you are happy or not.

能源的未来在于平衡经济增长与环境管理。

你唯一应该努力超越的人，就是昨天的自己。

艺术是一种抵抗的形式。