membrane permeation的用法和样例：
例句
- The basis for membrane separations is the difference in permeability of a semiporous membrane to different molecular sizes.
膜分离技术的基础是不同大小的分子对半渗透膜渗透性不同。 - Ceramic membrane, a new type of membrane, may be polluted and obstructed in use, so that the flux is decreased gradually, especially for ceramic membrane used in sewage treatments.
摘要陶瓷膜是一种新型材料的膜，其在使用过程中会产生污染和堵塞，使膜渗透通量逐渐下降，尤其是应用于污水处理过程中的陶瓷膜，污堵随时发生。
