滞留作用不仅阻断了驱油通道，导致洗油效率下降，而且还会引起地层堵塞，使注入压力升高。
The role of retention will not only block flooding channel, resulting in displacement efficiency declined, but also cause formation plugging, leading to injection pressure increased.
第二，单流阀效应引起孔隙压力下降，割理闭合，导致侵入的压裂液滞留其中。
The second is unilateral flow bring about the pore press lower, cleats close, and fracturing fluid deeped in it will settle.
一个人遇到交通堵塞时，长期的滞留在机动车辆中，吸入大量汽车的烟尘，吃被污染了的食物——这是产生压力的普遍原因，并且还伴随着健康问题的产生。
One faces traffic jams, long stay in vehicles, inhalation of fumes from automobile, eating polluted foods and food materials etc are common causes of stress with its attendant health implications.
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