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

According to the Priestly source, blood, the blood that courses through one's veins, represents the life force.

根据祭司资料，血,在人血管中流动，代表着生命的力量。

耶鲁公开课 - 旧约导论课程节选