pernicious gases

基本解释

One of the most effective measures to control pernicious gases ejection and turn them into harmless gases is to use ternary catalyst.
控制有害气体的排放，将有害气体转化为无害气体的有效措之一就是采用三元催化转化器。
Not only have the advantages of sending no harmful gases of formaldehyde, benzene, ammonia and TVOC (volatile organic compounds) out, also with the function of absorbing diversified pernicious gases.
不仅具备不散发甲醛、苯、氨气、VOC（挥发性有机化合物）等有害气体的优点，而且具有吸附有害气体的功能。
xkyn.net
The emissions produced during coke oven coal-charging contain pernicious gases, pollute the environment, and is harmful to human health.
焦炉装煤烟尘含有害物质，污染环境，危害人体健康。