The membrane can be used for concentrating ethanol from dilute ethanol-water mixture through pervaporation process owing to its alcohol-permselective properties.

通浓度乙醇-水渗蒸发试验研究，表明该膜是一种性较好新型优先醇膜。

Aren't all membranes semi-permeable? That is, the whole point of a membrane is that it lets some things through and others not. Membranes by definition are permselective or semi-permeable barriers.

也就是说他认为所有膜都是，从定义来看就是选择或者结构。