smoking gun确凿证据smokingadj.抽烟的；熏制的n.吸烟；吸烟区动词smoke的现在分词.smoking-room humor.下流的笑话Smoking is prohibited.禁止吸烟。smoking factory chimneys冒着烟的工厂烟囱smoking-room anecdotes闲谈趣闻smoking cessation relapse戒烟失败Smoking is a bad habit.抽烟是种坏习惯。smoking-free cigarettes无烟香烟Smoking affects health.吸烟影响健康。Smoking or nonsmoking?Smoking is his weakness.抽烟是他的癖好。