the wrong kind of fat in particular, is not considered a good thing.

尤其是不良的脂肪并不是一件好事
You need some of it

但你也需要一些甘油三酯
because some of it gets converted into molecules called phospholipids,

因为它们可以转化成磷脂分子
and phospholipids are different.

而磷脂又各不相同
They have two fatty acid chains

它们含有两条脂肪酸链
and so these are the oily like parts of the molecule,

这是部分分子具有油脂的属性
the molecules that behave like oil.

使磷脂分子具有油脂的属性
And then linked to the glycerol instead of a third fatty acid chain

但连到甘油上的第三个基团不是脂肪酸链
is a water soluble molecule,

而是一种水溶性的分子
like a salt.

像盐一样
Often it's a salt called phosphocholine and

它通常是一种叫磷酸胆碱的盐
so you get a phospholipid

这样你就得到了一种