痰是一种异常分泌物积聚在体内,时间一久,就可能引起发烧。因此,痰是需要咳出来的,尤其是黄痰。很多人会问,为什么跟外国人相比,中国人好像更喜欢吐痰吐口水,有体质或人种上的原因吗?其实,在公共场所吐痰和吐口水,主要跟个人的行为习惯和整个社会的文明程度有关,跟体质和人种无关。痰是一种异常分泌物,积聚在体内,时间久了,就可能引起发烧。因此,痰是需要咳出来的, Phlegm is an abnormal accumulation of secretions in the body, over time, it may cause fever. Therefore, sputum is needed to cough, especially yellow sputum. Many people ask why Chinese people prefer to spit and spit in comparison with foreigners because of physical or ethnic reasons. In fact, spitting and spitting in public places are mainly related to individual behavior and The level of civilization throughout the community, with nothing to do with the physical and ethnic. Sputum is an abnormal secretion, accumulated in the body, over time, it may cause fever. Therefore, sputum is needed to cough out,