无产阶级夺取政权，把生产资料变为国家财产。

The poet is a man who manages to be, in his own lifetime, what all men would like to be after their death.

能源转型不仅仅是更换燃料；它关乎整个系统和思维方式的转变。

无论你做什么，都要追随自己的内心。

模型的目的是足够简单以便理解和使用，但又足够复杂以捕捉系统的基本特征。