rate of flow of air 空气流量
out of flow of air 喘不过气来 ; 上气不接下气
flow of air 空气流量
flow of air pump 气泵流量
deep flow of air 做深呼吸
mass flow of air 空气的质量流量
total flow of air 空气总流量
volume flow of air 空气的容积流量
Ensure there is a free flow of air around the machine.
要确保机器周围空气畅通。
To generate lift, a bird has merely to tilt its wings, adjusting the flow of air below and above them.
为了产生抬升力，鸟儿们只要倾斜翅膀，对从身体上方和下方通过的气流稍作调整。
It provides a continuous flow of air into the throat and lungs while the person sleeps.
当病人入睡后，它向病人的喉部和肺部提供持续气流。
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