大自然似乎有意让电的定律从大空间观察到的现象中推导出来,而不是从实验室狭窄范围内观察到的现象中推导出来。
拿一个物体。对它做点什么。再对它做点别的。
Sustainable development requires balancing economic benefits with environmental protection.
"The world is not a problem to be solved but a mystery to be lived."