以收集食物为例。

Take food collecting, for example.

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味觉是一个主观因素，我们通常不会以食物为对象进行偏好测试。

Taste is such a subjective matter that we don't usually conduct preference tests for food.

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随着野兔密度的增加，这些树枝的数量减少，迫使野兔以低质量的高纤维食物为食。

As hare density increases, the quantity of these twigs decreases, forcing the hares to feed on low-quality high-fiber food.

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A good example of that is Pollan's book, In Defense of Food, that you started reading now.

以鲍兰的著作《为食物辩护》为例,这本书你们已经开始读了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选