The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome of the historical process.

海洋的健康直接影响地球和人类的健康。

Sustainability isn't a cost—it's an investment in our future.

人类不仅是自然的产物，也是自然的改造者，常常带来不可逆转的后果。

我们都是自己思想的囚徒，只有通过自我反思，我们才能获得自由。