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二手烟是指从吸烟者吐出的烟雾被其他人吸入,二手烟对吸入者的身体健康有很大的危害。但是你听说过三手烟吗?
Secondhand smoke means that the smoke emitted by smokers is inhaled by other people and secondhand smoke is a great danger to the health of inhalers. But have you heard of three cigarettes?