Sometimes the most powerful images are the ones that leave room for the viewer's imagination to wander.

The mind's work is never done, because adaptation is never complete.

城市是人类最伟大的发明。

哲学的功能是在作为统治阶级武器的科学思想和作为无产阶级武器的科学思想之间划清界限。

随机实验是因果推理的黄金标准，但它们并不总是可行的。