People use their hands to cover their mouths when they laugh or cough.人们笑或咳嗽时用手捂住嘴表示礼貌
cover one's mouth with hands祝学习进步，天天快乐！满意请采纳！谢谢！：）
Please cover your mouth when you are coughing.
当你咳嗽时用手捂住你的嘴When you cough hand over your mouth当你咳嗽时用手捂住你的嘴When you cough hand over your mouth
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上海花满屋
