It can come from animal sources and from vegetable sources, and the two have different impacts on health.

它可能来自动物,也可能来自植物,这两种对健康的影响各不相同

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Questions, well, they're different, even rhetorical questions are different, aren't they, from statements of fact.

这些问题，各不相同，即使是隐喻的问题也如此，实际上从陈述上来看。

耶鲁公开课 - 现代诗歌课程节选