That it is intended as a kind of joke to, in many ways, discredit the idea of the just city or at least to indicate its extreme implausibility.

目的是要用作戏谑，在很多方面，使人怀疑正义之城的概念,或至少是要指明其极难令人置信。

耶鲁公开课 - 政治哲学导论课程节选

I think that many years ago, in the early 90s or 80s, or the 70s even, it was a very dangerous city.

我想很多年以前的八九十年代或者甚至七十年代，它是一个非常危险的城市。

在上西区 - SpeakingMax英语口语达人