盖亚假说是为那些喜欢散步或只是站着凝视的人准备的,他们思考地球及其承载的生命,并推测人类活动的后果。
成为你希望在世界上看到的变化。
True innovation comes from a deep understanding of user needs.
The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.