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 vitiates the air.吸烟会污染空气。Smoking is very enjoyable.吸烟是种享受。Smoking is forbidden here.此地禁止抽烟。Smoking is a harmful vice.吸烟是一种有害的恶习。smoking with perchloric acid高氯酸冒烟Smoking - related attitude吸烟信念smoking preservation of food食品烟熏保藏Smoking is bad for health.吸烟对身体有害。Smoking is prohibited here.这里禁止吸烟。Smoking is habit-forming.抽烟成瘾。