二手烟，又被称为环境香烟烟雾(ets)，是由香烟，烟斗，雪茄，或是吸烟者肺部发散出来的烟雾混合体。

Secondhand smoke, also known as environmental tobacco smoke (ETS), is a mixture of the smoke given off by the burning end of a cigarette, pipe or cigar and the smoke exhaled from the lungs of smokers.

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二手烟，又被称为环境香烟烟雾(ets)，是由香烟，烟斗，雪茄，或是吸烟者肺部发散出来的烟雾混合体。

Secondhand smoke, also known as environmental tobacco smoke (ETS), is a mixture of the smoke given off by the burning end of a cigarette, pipe or cigar and the smoke exhaled from the lungs of smokers.

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