农时:指春耕、夏耘、秋收三个时令。与其等灾荒来了再想办法补救,不如早防备灾荒,而防备灾荒最好就是抓住农时。
过去在我心中跳动,就像第二颗心。
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.
The concept of law is essentially a matter of social fact.