机动车辆是几种重要的空气污染物的主要来源：一氧化碳、挥发性有机化合物，和氮氧化物。
Motor vehicles are the primary source of several important air pollutants: carbon monoxide, volatile organic compounds, and nitrogen oxides.
土壤蒸气抽排是一种当前国外广泛应用的土壤现场修复技术，它能经济高效地去除非饱和带土壤中的挥发性有机污染物。
Soil vapor extraction (SVE) is a cost-effective in-situ soil remediation technology being used widely abroad for removing volatile organic compounds (VOCs) from soil in the unsaturated zone.
土壤蒸气抽排是一种当前国外广泛应用的土壤现场修复技术，它能经济高效地去除非饱和带土壤中的挥发性有机污染物。
Soil vapor extraction (SVE) is a cost-effective in-situ soil remediation technology being used widely abroad for removing volatile organic compounds (VOCs) from soil in the unsaturated zone.
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