semi permeable

基本解释

Pressurized water is passed over a semi-permeable membrane which allows the passage of water molecules while rejecting the passage of larger ions.
受压水经过半渗透膜，使得水分子能通过，而更大的离子却不会通过。
This involves tapping both freshwater and seawater at the mouths of Norway's many rivers and fjords, and diverting it to tanks on either side of a semi-permeable membrane.
这种技术的操作原理是：在挪威众多的河流与峡湾口抽取淡水与海水，然后将这些水资源输转到半透膜任意一边的储水库中。
So of course A then flows through this, what's called a semi-permeable membrane.
那么当然A会流过这个，这个被称为半透膜。