而且，古代罗马上层社会吃饭和喝水使用的器具都含有铅。

Moreover, many high-level Romans suffered gout, which is the result of lead or leaded eating and drinking vessels.

youdao

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。

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