So the status of slave was lowest, ; freed persons was next highest in Roman Law; and free people were next.

所以罗马律法中，奴隶的地位是最低的，然后是自由人;,接着是自由民。

耶鲁公开课 - 新约课程节选

Well Pete, you see, there was this free labor system and this slave labor system," blah-blah blah-blah.

皮特你知道,当时北方是自由劳动制,而南方是奴役劳动制",等等,等等

耶鲁公开课 - 美国内战与重建课程节选

If slavery is natural, and if nature intends to distinguish the slave from the unfree, the free from the unfree, ? how can nature miss the mark?

如果奴役是自然的演变，而自然倾向于,将奴隶从不自由的人中区别出来，将自由从不自由中区别出来，自然如何会偏离正轨？

耶鲁公开课 - 政治哲学导论课程节选

The North and the South had roughly, as the Northern and Southern states, the Free states and Slave states, had roughly the same geographic size.

北方和南方大致上,北方和南方的各州有,自由州和蓄奴州的区别,但其地理大小总体上相同

耶鲁公开课 - 美国内战与重建课程节选