原因之一是人们上瘾cigarettes.to会上瘾的,就是你的身体就需要them.the上瘾物质在香烟nicotine.when人吸烟的尼古丁得很顺利进入血液循环流,使人们感到relaxed.a抽烟的尸体惯于尼古丁,如果他停止吸烟他觉得nervous.many吸烟者尝试戒烟但由于现行的尼古丁上瘾,他们感到非常不舒服,他们常常觉得太难以停止. Another reason is that people simply enjoy smoking and what it symbolizes.Having a cigarette for many people means taking a break.For some people smoking because part of certain social rituals,for example,a cigarette after dinner.Many people enjoy smoking because it give you something to do with your hands.Reaching for a cigarette,lighting it,flicking the ashes is especially comforting in situations where a person feels tense.另一个原因是,人们只是享受吸烟什么symbolizes.having一支香烟,很多人就是以一break.for有人吸烟,因为参与某些社会礼仪,举例来说,一支香烟后dinner.many人民享受吸烟,因为它让你大概跟你hands.reaching为一支香烟,灯光,flicking骨灰是特别令人欣慰的情况:人感到紧张. Many people also like the taste of tar in cigarettes.也有很多人喜欢的味道,香烟的焦油含量. However,it is tar that causes cancer.While governments and health experts have tried to get people to give up smoking entirely ,cigarette manufactures have tried to keep selling them by produing cigarettes with less tar.Many people in western countries have welcomed these cigrettes since they find it hard to stop smoking but want to reduce the risk to their health.但是,它是焦油,造成cancer.while政府和卫生专家试图使人们放弃吸烟完全香烟制品已试图使它们出售的香烟produing少tar.many人在西方国家对此表示欢迎这些cigrettes因为他们难以戒烟,但要减少对他们的健康. Questions:问题: What is the substance in cigarettes that causes cancer?是什么物质在香烟导致癌症? What are the health experts trying to do?什么是健康专家究竟在做什么? What is the best title for this passage?什么是最好的标题为这一段话?
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