在四节大型哲学课上，一半学生阅读了一篇关于工厂化养殖肉类的伦理文章，非强制性观看了一段11分钟的视频，并开展了50分钟的讨论。

Half of the students in four large philosophy classes read an article on the ethics of factory-farmed meat, optionally watched an 11-minute video on the topic and joined a 50-minute discussion.

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but once I could see that ethics and political philosophy really could make a difference to the way we live our lives.

但是当我看到，伦理学和政治哲学,的确可以改变我们的生活方式时。

普林斯顿公开课 - 人性课程节选