Desalination is carried out by simply lowering into the ocean a long, hollow pipe capped at the lower end by a semipermeable membrane . 用一根长空心尼龙管插入海水里，并用半透膜封住较低的一端来进行海水淡化。
2.
When separated by a semipermeable membrane ( e . g . a cell membrane ) water moves by osmosis into the hypertonic solution from the hypotonic solution 当用半透膜（如细胞膜）将两种溶液隔开，水分就会在渗透压的作用下从低渗一侧向高渗溶液流动。
3.
This ultrafilter adopts dissymmetrieal semipermeable film which is made from macromolecule material with special process the raw liquid fiows under pressure ， inside or out side the film the mscromolecule substance and colloid particles in the raw liquid are clogged at the film suface and are brought away by circulating raw liquid then the raw liquid becomes inspissated ， and further more ， the subtance in liquid is seperated 本设备是以高分子材料采用特殊工艺制成的不对称头透膜，在压力作用下，原液在膜内或膜外流动，其中的高分子物质，以及胶体粒子则被阻止在膜面，被缩和提纯的目的。
4.
This ultrafilter adopts dissymmetrieal semipermeable film which is made from macromolecule material with special process . the raw liquid flows under pressure , inside out side the film suface and are brought away by circulating raw liquid . then the raw liquid becomes inspissated , and further more , the subtance in liquid is seperated 本设备是以高分子材料采用特殊工艺制成的不对称头透膜，在压力作用下，原页在膜内或膜外流动，其中的高分子物质，以及胶体粒子则被阻止在膜面，被循环流动的原料带走而成为浓缩液，从而达到了物料的分离浓缩和提纯的目的。
5.
This ultrafilter adopts dissymmetrical semipermeable film which is made from macromolecule material with special process , the raw liquid flows under pressure , inside or out side the film , the macromolecule substance and colloid particles in the raw liquid are clogged at the film suface and are brought away by circulating raw liquid . then the raw liquid becomes inspissated , and further more , the substance in liquid is separated 本设备是以高分子材料采用特殊工艺制成的不对称头透膜，在压力作用下，原液在膜内或膜外流动，其中的高分子物质，以及胶体粒子则被阻止在膜面，被循环流动的原料带走而成为浓缩液，从而达到了物料的分离浓缩和提纯的目的。
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