Sustainability isn't an option; it's a responsibility we owe to future generations.

This part of my life,this little part is called "happiness".

给学生一些事情去做，而不是一些东西去学；而这些事情的性质需要思考；学习会自然而然地发生。

The iron rule of nature is: you get what you reward for. If you want ants to come, you put sugar on the floor.

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

可持续林业不仅仅是砍伐树木，更是培育文明。