semi-permeable membrane的用法和樣例：
例句
- Desalination is carried out by simply lowering into the ocean a long, hollow pipe capped at the lower end by a semipermeable membrane.
用一根長(cháng)空心尼龍管插入海水里，并用半透膜封住較低的一端來(lái)進(jìn)行海水淡化。 - The solvent, in this case water, is passed through the membrane while the impurities are collected at the membrane's surface.
這樣，便使水通過(guò)半透膜，而雜質(zhì)則聚集在膜的表面上。
