“二手烟”是指由吸烟者在吸烟时燃烧烟草制品产生的烟雾。当空气受到烟草烟雾污染时,特别是处于密闭环境中时,所有身处其中的人都会吸入烟雾,不管是吸烟者还是非吸烟者都会身受其害。由于吸入烟雾并非主动吸烟者,所以这也被普遍称为“非自愿吸烟”或“被动吸烟”。 “Secondhand smoke” refers to smoke produced by smokers burning tobacco products while smoking. When the air is contaminated by tobacco smoke, especially in a confined environment, all people in it will inhale smoke, and both smokers and non-smokers will suffer. Since inhaled smoke is not an active smoker, it is also commonly referred to as “involuntary smoking” or “passive smoking.”