A lot of things happen as the body reacts to an injury like a broken bone.

VOA: special.2009.02.04

Nutrients get broken down into several classes and these are the constituents of food that your body uses for one purpose or another.

营养素这个问题需要花几节课来讨论,它们是食物的组成要素,供给身体吸收,支持身体机能运转

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选