But in some parts of the class

但是在我们的某些课程中
the distinction between nutrients and food is made quite distinct.

营养素与食物之间有明确的分水岭
The person who does that best is Michael Pollan,

这一点上迈克尔·伯伦做得最好
and when you read his book, In Defense of Food,

你们可以看看他写的书《为食物辩护》
he spends some time in the book defining what food is

他在书中给食物下了定义
and working through this--this quagmire of how do we define food

并深入地探讨了这个难题
and what's acceptable to eat,

即如何区分食物与能吃的东西
what's socially acceptable,

社会普遍接受的东西
what's personally acceptable.

个人能够接受的东西
It's a very interesting discussion,

这是一次非常有趣的探讨
but he also talks--and this is discussed in his book--

他在书中还提到了
about the concept of nutritionism.

营养学的理念