Essentially what's going on here is the underlying Akkadian words, I guess, are awilum, mushkenum, and then a third category, slave.

本质上来说，这里所使用的是阿卡德的基础语言，也就是阿维鲁，穆什钦努以及属于第三级别的奴隶。

耶鲁公开课 - 旧约导论课程节选

The matter the substance the material basis of a regime concerns its citizen body.

本质，政体的物质基础,是其公民本体最关心的。

耶鲁公开课 - 政治哲学导论课程节选

What's the key or the nature or the basis of personal identity?

什么是个人同一性的关键,本质或基础

耶鲁公开课 - 死亡课程节选