有毒有害气体是指有毒并对身体有害的气体。
露天矿开采过程产生大量粉尘和有毒有害气体，影响范围广，造成严重后果。
A large amount of dust and harmful gas are produced in the open - pit mining process, which can affect a large area and cause serious consequences.
随着国家环保法规的不断完善，对汽车有毒有害气体的排放限制越来越严格。
With increasing awareness to the environmental protection, the limitation on exhaust emission of cars has become increasingly stringent.
本文提出了一种新型的监测有毒有害气体浓度的系统，阐述了系统的硬件设计及选型。
This paper presents the design method for a new type of monitoring system of poisonous and detrimental gas and introduces the hardware design of the system.
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