Nicotine is an addictive substance and many people find it very hard to stop smoking, even when they really want to.
尼古丁是成瘾物质。许多人发现即使自己真的想戒，要停止吸烟也非常困难。
And if he doubted that, he had only to note that in his own hard-smoking family a grandfather, an uncle and an aunt had all died of lung cancer.
最算他还会怀疑抽烟有害健康，他也该注意到一件事实，就是自己重度瘾君子的家族里，祖父、叔叔和阿姨共三位皆死于肺癌。
Quitting smoking is hard work and your efforts should be rewarded.
戒烟的确很难，因此付出的努力应该值得鼓励。
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