But if you throw off the environment, in this case, the animal's biology, it's drive for certain nutrients is in concert with the food it has access to.

如果让它们换个环境,这种情况下,这些动物的生理特性,即它们有多少动力去获取某些营养元素,是与其食物源状态有关的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

It is, of course, important if you use animal testing to treat the animals with as much dignity as possible.

如果要用动物做实验的话，请给予这些动物最大的尊严，我认为一点十分重要。

需要动物实验吗？ - SpeakingMax英语口语达人

If you change the animal's environment and you give it access to these sort of foods, and these are the pictures that I showed in the first class, and you remember I asked you what constituents of this diet promoted obesity and you said it was fat, sugar, and variety that was correct.

如果你改变动物所在环境,再给它们这些食物,这些图片我们在第一课见到过,我问过这些食物中哪些成分使人发胖,你们说脂肪,糖和其他成分,没错

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选