不吸烟者在空气不流通的环境下不情愿地吸入吸烟者吐出的烟雾，是间接性的吸烟passive smoking

• 据英国《镜报》报道，英国16岁以下未成年人因被动吸烟患病人数超过30万，平均每天800人因被动吸烟患病就医。

  According to the UK paper the Daily Mirror, in the UK there are over 30,000 patients aged 16 or younger who are ill due to passive smoking. Every day, an average of 800 people are treated for diseases caused by passive smoking.

• 有个小伙子发明了一种被动吸烟计数器。

  A young man invented a machine to measure the number of times one is exposed to passive smoking.