It's not the best form of food in that they're actually very poor in protein, and unfortunately very, very rich in cyanide.

但木薯的根并不是最好的食物,因为它的蛋白质含量很少，而更不幸的是，它的氰化物含量非常，非常高。

麻省理工公开课 - 化学原理课程节选

Here's a list of ingredients from Skippy Peanut Butter and you see that sugar is the second most common ingredient.

这有一份四季宝花生酱的配料表,你可以看到糖是含量第二多的原料

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But the fact is there are trace, trace amounts.

但事实是它的含量非常，非常小。

麻省理工公开课 - 化学原理课程节选

Fat has twice the calories per unit weight that protein or carbohydrate sugar has, as a consequence, has the greatest survival value.

单位重量中脂肪的热量含量,是蛋白质和碳水化合物的两倍,因此,脂肪才是最能维持生存的物质

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And then, you can look at the nutrient broken down as a function of the percent daily values.

下面是各种营养成分的含量,及其所占每日建议摄取量的百分比

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

As I mentioned before, fat has twice the calories per unit weight as protein and carbohydrate.

如我之前所说,单位重量中脂肪的热量含量,是蛋白质和碳水化合物的两倍

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now this is a little counterintuitive, because very often people underestimate the amount of calories in things, but what's important here is the-- the error, the size of the error.

这与我们的直觉有些相反,因为经常性地,大家低估了卡路里含量,重要的是,误差和误差的大小

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And the fact is, food is healthier if it has less trans fat, but it depends on what fat's swapped out for it, because if you put a healthier fat in then it's--then you get a certain amount of improvement.

事实是,如果食物中反式脂肪的含量较低,确实会更健康,但这取决于被剔除的脂肪种类,因为如果加入较为健康的脂肪,食物的质量会获得一定程度的改善

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You can see down here its affect on cholesterol levels: that the bad fats raise the LDL levels, the low-density lipoproteins levels, that's not good for you.

在下面你可以看到它对胆固醇含量的影响,坏脂肪会提高LDL含量,低密度脂蛋白含量,这是对身体不好的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选