permselective

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.

说他认为所有的膜都半透的，从定义来看选择透过或者半透结构。

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

通过对低浓乙醇-水的渗透蒸发的试验研究，表明该膜一种性能较好的新型优先透醇膜。