A supplement, he points out, is something that either completes something that isn't complete or adds to something that already is complete.

他指出，一个补充物，或者是补充了不完整的事物,或者补充了已经完整的事物。

耶鲁公开课 - 文学理论导论课程节选

It's very difficult even to keep in mind the conceptual difference between these two sorts of supplement.

要记住,这两种补充的不同是很难的。

耶鲁公开课 - 文学理论导论课程节选

It means that we supplement our diets with all sorts of things to fix perceived deficits in this mineral, in this vitamin, in this thing that somebody tells us is good for us.

也就是说,我们只要听说哪些是有益的,就用各种各样的东西来进补,这种矿物质,那种维生素,诸如此类

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选