Try elevating your head by putting blocks under the top of the bed and sleeping on your left side.
试试：在床头垫高，这样就会使你的头部抬高，然后采用“左侧侧卧睡姿”；
The vapor mass fraction at the outlet of the elevating tube increases with the decrease of the driving liquid head.
提升管出口处的气体质量分数随着试件浸没深度的增大而减小。
The vapor mass fraction at the outlet of the elevating tube increases with the decrease of the driving liquid head.
提升管出口处的气体质量分数随着试件浸没深度的增大而减小。
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