采用大多数给药途径给药(静脉注射除外)的药物在进入体循环之前必须通过数层半渗透性细胞膜。
When given by most routes (excluding iv), a drug must traverse several semipermeable cell membranes before reaching the systemic circulation.
电渗是要讨论的最后一个过程，当涂料固体份在阴极上沉积之后，此涂膜为半渗透性。
Electroendosmosis is the final process to be discussed. As paint solids are drawn to the cathode and precipitated, the film becomes semi-permeable.
考虑衬砌和围岩(土)的相对渗透性，隧洞处于半封闭状态。
Considering the relative permeability of lining and surrounding rock or soil, the tunnel is assumed to be partially sealed.
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