认知地图不是头脑中的一幅图或模型，而是环境的动态变化表征。
The cognitive map is not a picture or a model in the head, but a dynamic, changing representation of the environment.
Forests are the lungs of the earth, and we must protect them with the same urgency as our own health.
对付一个不自由的世界的方法，就是变得如此绝对自由，以至于你的存在本身就是一种反抗。