Experts at Penn State University have a simple answer: When its undesirable qualities outweigh its good qualities.

VOA: special.2009.05.26

Make sure you have batteries that are in a good state of charge in your calculator.

确保你的计算器电池,处在一个良好的状态。

麻省理工公开课 - 固态化学导论课程节选

It's not a good thing if you're just looping and checking some condition, but never actually changing the state of the world.

这不是一个好事情，如果你只是循环,检查一些条件，但是永远不要改变世界上的国家。

哈佛公开课 - 计算机科学课程节选

The libertarian says it may be a good thing if people wear seatbelts but that should be up to them and the state, the government, has no business coercing them, us, to wear seatbelts by law.

自由主义者说，系安全带也许是件好事,但这应由人们自己作主,政府没有资格,用法律来强迫人们系安全带。

耶鲁公开课 - 公正课程节选

No matter what its constitution was, no matter how these differed from one another, the idea was that the state has to make good men and that for a city to be good, the men must be good.

不论宪法体制如何,不论世间千变万化,其主旨始终围绕着,政府必须培育良民,而只有公民优秀,才能让城市更加美好

耶鲁公开课 - 古希腊历史简介课程节选