可持续发展不再是可选项，而是我们对后代的责任。

Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.

通货膨胀始终且处处是一种货币现象。

休息隶属于工作，正如眼睑隶属于眼睛。