送交者: cornbug 于 2005-8-28, 14:42:42:
回答: IS there any body English good enough to write a letter 由 xj 于 2005-8-28, 12:50:51:
So permeable-proof membrane is 防渗膜?
There are man-made semi-permeable membrane that selectively allows certain molecules to go through.
I don't know the context of what professor Zhang was talking about. But all biological membranes are selectively permeable, depending on the molecular weight, right?