The membrane is impermeable to blood cells and large molecules such as proteins, but small ones can get through it.
血液分子和一些大分子例如，蛋白质，是无法渗透隔膜的，而小分子仍然可以通过。
This employs high-pressure pumps to force the water from brine through a membrane that is impermeable to salt.
这种方法需要用高压泵使海水通过一种不能渗透盐的薄膜，从而淡化海水。
The present invention relates to an impermeable shoe (1), particularly a hiking shoe, comprising a shank (2), a breathable membrane (3) and an inner liner (4).
本发明涉及防水的鞋(1)，尤其是防水的旅游鞋，所述鞋具有鞋帮(2)、防水透气膜(3)和内衬体(4)。
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