The main aim of this system is to keep main vapor pressure stable when the bed layer temperature is within a limit.

该系统在床层温度不越限的情况下，以控制主蒸汽压力稳定为主要目标。

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Upward flow is injected via screen plate periodically, allowing the lift of bed layer to be loose and flow to drop (or stop rising).

通过筛板周期地鼓入上升水流，使床层升起松散，接着水流下降(或停止上升)。

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When the bed load round the cylinder with water flow, a region of non sediment's moving will be formed in the bed layer near the cylinder.

试验发现推移质泥沙随水流绕过圆柱体时，将在圆柱周围的床面上形成一个无沙区。

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Huddled on the bed with her two older siblings and her little cousin, Ahad says the war has created a layer of nightmares, each different from the next.

CNN: Horrors rampant in city 'full of sorrow'

Bed-nesters looking for support have two options: Place the bolster on the mattress right against the headboard and layer on regular pillows to create a slanted wedge, ideal for watching TV.

WSJ: Bolster Cushions Win Best Supporting Rolls