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
者半透结构。
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者半透结构。
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