跟阻塞性睡眠呼吸暂停综合症类似的一种更温和的症状是呼吸道阻力综合症，当一些类型的阻力减慢或堵塞鼻腔通道的空气传送时就会发生这种症状。
Sort of a milder cousin of sleep apnea, UARS occurs when some type of resistance slows or blocks air in the nasal passages.
通风是地下采矿必须考虑的重要问题。很多矿井都很深，因此必须送人足够的空气。有的矿井还有高温和潮湿的问题。
Ventilation is a major consideration in underground mining. Many mines are so deep that adequate air must be pumped in; others have problems with heat and humidity.
通风是地下采矿必须考虑的重要问题。很多矿井都很深，因此必须送人足够的空气。有的矿井还有高温和潮湿的问题。
Ventilation is a major consideration in underground mining. Many mines are so deep that adequate air must be pumped in; others have problems with heat and humidity.
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