根据地层压力与静水压力的比值大小，可将地层压力分为异常高压、异常低压和正常压力三种压力状态。
Reservoir pressure can be divided into normal pressure, abnormal high pressure and abnormal low pressure in terms of the ratio between formation pressure and hydrostatic pressure.
根据混凝土渗透性驱动力的种类，将其概念划分为毛细孔压力渗透性、水压力渗透性和浓度差渗透性（或称离子渗透性）三种。
There are capillary pressure permeability, hydraulic pressure permeability, and ion permeability(or concentration difference) on the basis of driving forces of concrete permeability.
民警的压力源从形式上可分为工作压力源、生活压力源和社会压力源三种。
It can be derived from three origins of pressure, which are from work, from life and from society.
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