专业化学英语翻译!急

Through selective material on the film as semipermeable membrane. generally only through the solvent and solute film can not call it ideal semipermeable membrane. When a dilute solution of the same size and concentrated solution were placed on both sides of the semi-permeable membrane, dilute solution of the solvent through the semipermeable membrane and spontaneous natural solution to the strong side movements, a phenomenon known as infiltration. A reverse migration is the reverse osmosis infiltration campaign is a pressure-driven, semipermeable membrane role in the choice of means to retain separate from the solution of the solute and solvent separation.