1·I would appreciate it if you would extinguish your cigarette with keeping the solemnity of the occasion.
为了与这庄严的气氛相一致，如果你能灭掉你的烟的话，我将会非常 感激 。
2·Please extinguish your cigarette when the 'no smoking' signs lights up.
当“禁止吸烟”的指示灯亮时，请您熄灭香烟。
3·Please extinguish your cigarette as the plane is preparing to land.
请您停止抽烟，因为飞机马上就要着陆了。
4·Please extinguish your cigarette when the 'no smoking 'signs lights up.
当“禁止吸烟”的指示灯亮时，请您熄灭香烟。