He and his wife Mary write back and forth about how evil slavery is.

他与他的妻子通过书信来往,表达对奴隶制的憎恶

耶鲁公开课 - 美国内战与重建课程节选

How successful was the cotton boom, how important was the cotton boom, what is the relationship between the spread of slavery, the spread of cotton, and power?

棉花业的兴盛是如何的成功,如何的重要,奴隶制的传播,与棉花业的兴盛,以及权利的扩散之间有什么关系

耶鲁公开课 - 美国内战与重建课程节选

Here it is not just the venerability of slavery, how old it is, but it's the idea that it has been crucial to the development of all great civilizations.

不仅仅讨论奴隶制的庄严性与历史由来,更是它曾经对人类文明的发展,起过至关重要的作用

耶鲁公开课 - 美国内战与重建课程节选