and so it wouldn't allow any molecules to pass through.

因此不会让任何分子通过
GORE-TEX, on the other hand,

而戈尔特斯
is fashioned--and this is a picture of GORE-TEX

经过了改造这是戈尔特斯材料的照片
at very high magnification here, so it has small pores in it.

放大了很多倍因此可以看到其中的小孔
Pores that are so small

这些小孔非常小
that a droplet of water can't pass through,

哪怕小水液滴也不能通过
but molecules of water can.

但水分子却可以
That's why GORE-TEX is so

这就是为什么戈尔特斯
useful as a material for hiking for rain gear,

能做户外用具和雨具
it allows water to evaporate through it

它能让水蒸汽通过
but doesn't allow drops of water to go in.

同时又能阻止水滴流入
You can make a waterproof

这样的防水用具