And statistically it probably is the case to some extents but it really doesn't matter.

从一定程度上说，这确实是个问题,但真的没关系。

哈佛公开课 - 计算机科学课程节选

And if you want to understand why so many white Southerners, especially in the Deep South, went to such great extents to save their slave society, remember the kinds of arguments and language used by its defenders.

如果你们想知道为何如此多的南方白种人,特别是南方腹地的人们,想要最大程度地保住他们的奴隶制社会,那就揣摩一下这些辩护者所使用的论断,和他们的语言,措辞

耶鲁公开课 - 美国内战与重建课程节选