moisture barrier

基本解释

In a proper sandwich, the cheese is adjacent to the bread to create a moisture barrier against the lettuce.
一个合格的三明治，芝士要紧贴着面包，这样会提供给生菜一个有水分的屏障。
That way you’ll be able to seal this type of outside wall with a continuous moisture barrier in cooler climate zones.
如果你在凉爽气候区，这样做可以帮你在外墙上形成一个连续的防潮层。
Because oil is like a lock moisture barrier, if this layer protective film disappears, then the water will soon be air-dry the external environment.
因为油脂犹如锁住水分的一道屏障，如果这层保护膜消失不见，那么，水分很快会被外界环境风干。