when foods are partially hydrogenated.

形成的不饱和脂肪
Again, when you see that partially hydrogenated oils

当成分表出现"部分氢化油"时
on an ingredient list, that means there's Trans fat.

就意味着含有反式脂肪
Why would companies do this?

公司为什么要这样做
Why would the food industry want to introduce Trans fat in the first place?

最初食品业为什么要引进反式脂肪呢
Well, it changes the food in ways that are commercially appealing for the industry.

这是因为它能使食品业获得更大利润
It gives foods a longer shelf life,

它增长了食物的保质期
and so things like pastries and individual wrapped packages have a very long shelf life,

让糕点和独立包装的食品等能存放很久
longer than if they don't have Trans fats.

比不含反式脂肪的食品存放时间长
They tend to stay stable during deep frying and then

它们还能在油炸中保持稳定
the palatability goes up and the foods taste better,

这使得食物口味更佳吃起来更加美味
at least according to the food industry.

至少食品业是这样认为的