A change in height across the courtyard is highlighted by the flow of water along a channel that drops down from the planted level to the cobbled floor and then funnels into a circular pond.
庭院中的高度变化通过沿着从种植水平下降到鹅卵石地板的通道的水流强调突出，最后汇聚成一个圆形池塘。
Sleep apnea is caused by the abnormal narrowing or blockage of the airways that allow air to flow into the lungs, which causes sudden drops in oxygen in the blood.
睡眠呼吸暂停因空气流往肺部的通道——气道——的不正常紧缩或堵塞引发，这会导致血液中的氧气含量骤然下降。
Formulae were derived to predict additional pressure drops due to mechanical skin and non-Darcy effect in the perforation radial flow and wellbore radial flow.
在射孔径向流和井筒径向流中，推导出了机械表皮因子和非达西流影响引起的附加压力降的表达式。
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