一个社会文化系统的行为基础设施是其上层建筑的主要原因。

Justice means minding your own business and not meddling with other men’s concerns.《理想国》

史记

And when his audience grew bored, he would spring into the air and do a back flip with a half twist.

地球也是球形的，因为它从各个方向向中心施加压力。

Banks must properly handle the relationship between development and risk, neither sticking to old ways nor advancing recklessly.