3000m above sea level, the thin air, the barometric pressure is low, the density reduces.
在海拔3000m时，空气稀薄，气压低，密度减小。
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一些偏头痛患者说高温及低压力也能引起偏头痛.
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Many margins migraine sufferers say hot weather and low barometric pressure can act as triggers.
许多偏头痛患者表示,天气炎热和低气压都是偏头痛的诱因.
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Many m migraine sufferers say hot weather and low b barometric pressure can tact as triggers.
许多偏头痛患者说热的天气和低的气压能成为“触发“.
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Many migraine suffers sufferers say hot weather and low barometric pressure can act as triggers.
很多患偏头痛的人说高温和低气压也可以导致头痛.
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许多偏头痛患者表示,天气炎热、气压低也都可能是诱因.
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Many migraine suffers sufferers say hot weather and low barometric pressure can add act as triggers.
很多患偏头痛的人说炎热的天气和低气压可以起到像触发器一样的作用.
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Many migraine sufferers say hot whether weather and low barometric pressure can act as triggers.
许多偏头痛患者说炎热的天气和低气压也会引起头痛.
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Many migraine sufferers say hot weather and low barometric pressure can act as triggers.
多数偏头痛患者说炎热的天气和较低的大气压是偏头痛的触发原因.
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Many migraine sufferers say, hard hot weather and low barometric as triggers.
许多偏头痛患者说较热的天气和较低的气压也会引起偏头痛.
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重点介绍了大气冷凝器的上水泵使用低扬程、大流量泵的工艺，以及正常开车时，在不开启喷射泵的情况下，通过旁路管可以排出不凝气等技改措施。
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