The city, as Aristotle understands, will always exist in a world with other cities or other states, based on different principles that might be hostile to one's own.

城市，如亚里士多德所认为，将永远会,和其它城市或国家同时存在，根于不同的管理原则,可能还会对自己人怀有敌意。

耶鲁公开课 - 政治哲学导论课程节选

That means that for humans it can be a difficult and hostile place.

也就是说，它对于人类是个艰难且充满挑衅的地方。

耶鲁公开课 - 旧约导论课程节选