When a smoker who tries to stop has a difficult time, it is not a sign of weakness.

一个试图戒烟的吸烟者有戒烟困难时，那并不是意志薄弱的表现。

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When a smoker quits, the body quickly starts to clean itself by coughing up the debris in the respiratory system that restricts breathing.

吸烟者戒烟后，身体迅速开始清理自己，咳出在呼吸系统中影响呼吸的残留物。

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Third-hand smoke is what one smells when a smoker gets in an elevator after going outside for a cigarette, he said, or in a hotel room where people were smoking.

当吸烟者在外吸完一支烟走进电梯或时，旁人闻到的即是三手烟。走进有人正在吞云吐雾的房间，闻到的也是三手烟。

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Their most serious challenge before the 1990s came in 1983, when Rose Cipollone, a smoker dying from lung cancer, filed suit against Liggett Group, charging the company failed to warn her about the dangers of its products.

CNN: A brief history of tobacco

Alternatively, it may be part of cognitive dissonance, which happens when a person's beliefs are not in line with their behaviors -- for instance, a smoker who berates other smokers.

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Nabi's work on a smoker's vaccine dates to 1996, when Ali Fattom, the company's vice president of research, came up with a workable vaccine for Staphylococcus aureus, a leading cause of infection in hospitals.

FORBES: A nicotine vaccine may help smokers stop for good.