单词	semipermeable
释义	semipermeable /sɛmɪˈpəːmɪəb(ə)l / adjective (Of a material or membrane) allowing certain substances to pass through it but not others, especially allowing the passage of a solvent but not of certain solutes: a semipermeable membrane... In dialysis a solution is passed over a semipermeable membrane, allowing solutes up to a certain size (but not larger molecules) to diffuse across the membrane to a second solution. A semipermeable membrane allows small solvent molecules to pass through, but not the larger solute molecules. Graham found that the rate at which some substances, such as inorganic salts, pass through a semipermeable membrane is up to 50 times as great as the rate at which other substances, such as proteins, do so.
随便看	paraldehyde paralegal paraleipomena paralexia paralexic Paralian paralic paralinguistic paralinguistics paralipomena paralipsis paraliturgical parallactic parallactical parallactic angle parallactic ellipse parallactic inequality parallactic instrument parallactic motion parallax parallax error parallaxis parallax scrolling parallel parallelable

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