Polyunsaturated fats in foods like sunflower seeds, walnuts and fish, also have significant health benefits.

多元不饱和脂肪存在于葵花籽、胡桃和鱼，对健康也带来很大的助益。

Corn oil, for example, is made up of lipids with lots of double bonds, also known as polyunsaturated fats.

例如，玉米油是由许多双键的脂类组成的，这类物质也叫作多元不饱和脂肪。

The problem with the polyunsaturated fatty acids in vegetable oils is that because of their structure, they are unstable.

菜油中包含的多元不饱和脂肪酸，化学结构极不稳定。

But it probably depends on the individual polyunsaturated fat.

但这可能取决于个体的多不饱和脂肪。

It has more protein and about the same proportion of polyunsaturated fatty acids.

它含有更多的蛋白质和大致相同比例的多不饱和脂肪酸。

But they still jabber on about saturated, or mono- polyunsaturated, omega-3, hydrogenated, or trans.

但他们仍然喋喋不休地谈论饱和或单多不饱和、omega-3、氢化或反式。

Less whole milk, more skim milk, a little less butter, way more polyunsaturated oils, less eggs and beef, and more lean chicken and turkey.

全脂牛奶无人问津，脱脂牛奶越来越受欢迎；黄油越吃越少，菜油消费急剧上升；鸡蛋牛肉吃得越来越少，而餐桌上的鸡肉火鸡肉愈发常见。

That's because polyunsaturated fats have some weak carbon-hydrogen bonds, which break and set off a chain of chemical reactions that eventually produce volatile compounds.

这是因为多元不饱和脂肪含有一些弱性碳-氢键，它们会进行分解，并产生一连串化学反应，最终产生易挥发化合物。

That’s because polyunsaturated fats have some weak carbon-hydrogen bonds, which break and set off a chain of chemical reactions that eventually produce volatile compounds.

这是因为多不饱和脂肪具有一些弱的碳氢键，这些碳氢键会破坏并引发一系列化学反应， 最终产生挥发性化合物。

Another tragic consequence of replacing saturated fats with polyunsaturated vegetable oils is losing out on the heart-protective effects of the fat-soluble vitamin, vitamin K2, found in animal fats.

将饱和脂肪换成富含多元不饱和脂肪的菜油，将带来另外一个恶果：失去脂溶性维生素 K2 的心脏保护作，用而动物油脂里富含维生素 K2。