| 例句 |
Roy believed his illness was caused by passive smoking.罗伊认为他的病是由被动吸烟引起的。Doctors say passive smoking has caused his lung cancer.医生说被动吸烟导致他患上了肺癌。The government has belatedly recognized the danger to health of passive smoking.政府认识到被动吸烟对健康的危害时，已经为时已晚。Campaigners handed out leaflets on passive smoking.活动人士派发了有关被动吸烟的宣传页。 |