In desertification areas of northwest China, the water content in the unsaturated zone originates from atmospheric precipitation and from water condensation.
西北荒漠化地区，包气带中的水分除来自大气降水外，还来自凝结水。
If a flammable cryogenic liquid is involved, the flammable mixture zone, under unusual atmospheric conditions, may extend beyond the normal fog cloud produced by condensing water vapor in the air.
如果同易燃低温液体有关，在异常大气条件下，易燃混合物地带会延伸到空气中的水蒸汽的浓缩产生的正常雾云以外。
Atmospheric pollutant of total load control is the most important measure to assure the future atmospheric environmental quality standard of industrial zone.
大气污染物总量控制是保证工业区未来大气环境质量达标的重要举措。
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