The most common type of membrane separation is called reverse osmosis. Seawater is forced through a semipermeable membrane that separates salt from water.
最常见的膜分离形式被称为反渗透，即海水在被迫通过半透膜的时候分隔出盐。
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Nanofiltration is a new separation technique located between reverse osmosis and ultrafiltration.
纳滤技术是一种介于超滤和反渗透之间的新型分离技术。
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Distillation is achieved by boiling and then recondensing water to remove insoluble contaminants; reverse osmosis uses a membrane separation process to accomplish the same purpose.