And today I want to start by going through the fourth colligative property that's commonly seen, what called osmotic pressure.
这一节课我会讲到，第四个常见的依数现象，即渗透压。
There is a heavy attenuation property and there exist sensitive relationships of increase function between attenuation constant and frequency, porosity, osmotic coefficient;
具有强衰减性，衰减系数与频率、孔隙度和渗透系数间存在敏感的增函数关系；
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