One ought to be interested and to take action on behalf of the polis.

个人应当服从集体的利益,并代表集体的利益行事

耶鲁公开课 - 古希腊历史简介课程节选

His appeal from the "ought" to the "is," to take one's bearings again, from the effectual truth of things.

他将，“应当“转为，“就是“的主张“,是基于，人们从有力事实面出发的意向。

耶鲁公开课 - 政治哲学导论课程节选

However, there's one other variable that you want to be aware of and that is, he knows he ought to be going straight ahead like that, but he also knows that his right flank is open.

然而,还有其他变数是必须考虑到的,那就是,士兵知道他是向前直行的,但是,他同样知道他的右路是洞开的

耶鲁公开课 - 古希腊历史简介课程节选