You need some of it because some of it gets converted into molecules called phospholipids, and phospholipids are different.

但你也需要一些甘油三酯,因为它们可以转化成磷脂分子,而磷脂又各不相同

耶鲁公开课 - 生物医学工程探索课程节选

They have two fatty acid chains and so these are the oily like parts of the molecule, the molecules that behave like oil.

它们含有两条脂肪酸链,这是部分分子具有油脂的属性,使磷脂分子具有油脂的属性

耶鲁公开课 - 生物医学工程探索课程节选

So they like to be in the membrane and they're stable there and they won't come out because their structure allows them to exist in these unique spaces.

所以它们在膜里稳定存在,而且也不会脱离膜,因为这些蛋白质的结构使其能存在于,磷脂双分子层这个独特的环境中

耶鲁公开课 - 生物医学工程探索课程节选

We'll see why they have to separate that in a minute, but they do that these lipid bi-layers solve that problem for them and they're self-assembled structures from these molecules called phospholipids.

我们马上会讲到为什么要把它们隔离开,脂质双层膜解决了这个问题,而这些自主装结构,就是由磷脂分子组成的

耶鲁公开课 - 生物医学工程探索课程节选