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　　Smoking论坛
　　The nicotine and other poisonous chemicals in tobacco cause lots of diseases, like heart problems and some kinds of cancer. If you smoke, you hurt your lungs and heart each time you light up. It also can make it more difficult for blood to move around in the body, so smokers may feel tired and cranky. The longer you smoke, the worse the damage becomes.
　　The Other Cost of Smoking来源：考试大
　　Using tobacco eats up a lot of money, too. A pack of cigarettes costs $4, on average. That means, even if you buy just one pack a week, you'll spend $208 in a year. Some people smoke a pack a day, which adds up to $1,460! That's a lot of CDs, computer games, and clothes.
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