三手煙是指在吸煙幾小時或幾天之后仍然殘留在地毯、衣物以及其他物品中的煙污染。據研究，許多人，尤其是煙民，都不知道三手煙會危害人們的健康。在接受調查的1500名煙民和非煙民中，絕大部分人都認同二手煙的危害。但當他們被問到是否知曉“吸入前一天有人吸煙的屋子里的空氣會危害你的健康”時,只有65%的非煙民和43%的煙民回答是肯定的。

      Third-hand smoke refers to the tobacco smoke contamination that lingers on carpets, clothes and other materials hours or days after smoking.According to a study, a large number of people,particularly smokers, have no idea that the third-hand smoke is a health hazard for people. Of the 1,500 smokers and nonsmokers surveyed,the vast majority agree that second-hand smoke is harmful.But when asked whether they agreed with the statement,“Breathing air in a room where people smoked yesterday can harm your health,”only 65% of nonsmokers and 43% of smokers gave the affirmative answer.

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