Fish have thin, permeable skin that allows for essential compounds to diffuse into and out of their bodies while they're underwater.

鱼有薄而可渗透的皮肤，允许必需的化合物在水下时扩散进出它们的身体。

Essential compounds are chemicals that our bodies need to function correctly but can't manufacture on their own...so we literally need to eat those kinds of fats in order to survive.

基本化合物是那些我们身体赖以正常运转，但是自身却不能合成的化学成分......因此，为了生存，我们确实需要摄食那些脂肪。