These days British prisoners have access to a far wider range of foods but nevertheless often make poor choices and consume diets that are far from ideal.

这些天来，英国囚犯们的食谱大有拓展，但他们能选择的食物依然有限，吃的东西仍就很差。

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Diets of these beetles vary from species to species.

这些甲虫喜食的食物因物种的不同而异。

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And so the amount of protein in a diet, from diet plan to diet plan, doesn't vary as much as the recommendations that these popular diets give you for fat and carbohydrate.

在不同食谱中,对于蛋白摄入量的差异,远远不如对脂肪,和碳水化合物的摄入量的差异那样大

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Much of the research has been conducted in obese people -- a population that can actually benefit from these extreme diets -- and in most studies the health of the participants is carefully monitored.

CNN: How crash diets harm your health