The contamination in the central air conditioning duct system is the one of the principal contamination of the indoor air, it include inhalable particle and microorganism.
中央空调通风系统送风中的污染物是室内空气的主要污染源之一，主要的污染物是可吸入颗粒物和微生物。
Under the intrude of the wastewater and particle power and mine gangue, the soil was suffered different level contamination, which did harm to agro-ecosystem and man health.
矿区土壤在矿山废水、粉尘以及矿山尾矿等的侵入下受到了不同程度的污染，给矿区的农业生态系统和人们的健康带来了危害。
Under the intrude of the wastewater and particle power and mine gangue, the soil was suffered different level contamination, which did harm to agro-ecosystem and man health.
矿区土壤在矿山废水、粉尘以及矿山尾矿等的侵入下受到了不同程度的污染，给矿区的农业生态系统和人们的健康带来了危害。
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