从物理上讲，井涌是由于井眼压力低于地层流体压力所致，从而引起流动。
The kick is physically caused by the pressure in the wellbore being less than that of the formation fluids, thus causing flow.
因为水会减轻身体受到的重力作用，你可以躺着游仰泳，从而避免在陆地上做运动引起的血液流动受阻的现象。
Because the water reduces the effects of gravity on your body, you can lie on your back to do the backstroke without risking the impaired blood flow such exercises can cause on dry land.
税收对价格的扭曲引起资源的流动，从而引起税基的流动。
Taxation causes the twist of price system, which results in the fluid of resources and the redistribution of tax base.
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