痰是呼吸道分泌出来的粘性液体,借咳嗽动作排出体外。吐痰人人皆会,但不一定都具备良好的吐痰方式。有些人不注意保持环境卫生,有痰随地吐,鼻涕甩一地,既影响卫生,又有损个人形象。有些所谓“爱卫生”的人,将痰吐在地上,用脚上穿的鞋一抹,以为看不见痰迹就算干净了,就不妨碍卫 Phlegm is a viscous fluid secreted by the respiratory tract, by cough movements excreted. Spitting everyone, but not necessarily have a good spitting method. Some people do not pay attention to maintaining environmental hygiene, spitting sputum everywhere, blowing their noses, affecting both health and personal image. Some so-called “love health” people will spit on the ground, with a touch of shoes on their feet, that can not see the sputum even if clean, it does not prevent the guard