不纯物质 meaning in Chinese

contaminated substance
foreign body
impure substance

They also say poor quality pesticides may contain poisonous substances or substances that are not pure
劣质杀虫剂中可能包含有毒物质或不纯物质。
Low grade fuels and / or polluted air can cause gum , varnish and carbon deposits to be formed in the carburetor during comustion which can result in rough idling , stalling and incrased gasoline consumption . 3 + 3 cleaner ' s superior formula will effectively remove gum , varnish and carbon deposits when sprayed directly into the carburetor , 3 + 3cleaner will clean carburetors , linkage , automatic chokes , pcv valves , heat risers , the spark plugs and the entiro system while lubricating and femoving moistuer on all moving parts , use 3 + 3 cleaner to restore efficiency , increase engine power maintain high gasmileage and have a smooth running engine
空气和汽油中的不纯物质,在汽车使用过程中会产生污垢和炭积物,阻塞汽车的化油器(呼吸系统) ,使汽车无力及加油不畅顺, 3 + 3牌化油器强力清洗剂独有的特殊配方,直接喷入于化油器内,能迅速有效地清除洗化油器,火花塞及燃油系统的油渍污秽和炭积物,并对转轴等旋转部位提供润滑及防锈保护,减少积炭的产生,使引擎起动顺利及平稳运转,增强马力及节省燃油