So Roman slavery and the freedom of that was actually one way that a few people in the Ancient World recognized some kind of social mobility, which was very rare in the Roman Empire.

所以罗马奴隶制以及奴隶释放制,被古代部分人认为是,某种社会阶级流动，在罗马帝国很少见。

耶鲁公开课 - 新约课程节选

However, when you keep going south in Italy, past Rome, Roman tradition says the city was founded in 754 or 753? 753.

然而,当你在意大利继续南下,越过古罗马城,罗马人一直认为罗马城,建于公元前754或753,应是753年

耶鲁公开课 - 古希腊历史简介课程节选