我们有责任为子孙后代留下一个比我们发现时更好的地球。
We have a responsibility to future generations to leave the planet in better shape than we found it.
事实就是真实的思维。
社会系统是个人与个人之间、群体与群体之间关系的网络。
The existence of a legal system is a matter of fact, not of morality.
In darkness, we learn to cherish the light.