Do you often encounter the embarrassing experience of having phlegm but being unable to cough it out? Many smokers have this problem. Do you know the harm of smoking? Do you really cough up phlegm? Let Kang Kang teach you how to cough up phlegm correctly, say goodbye to your "phlegm" friend, and welcome a healthy and comfortable life! Graphic works number: 653 Author: Huang Fei, Zhu Zhenjin, Lu Yuchen, Mao Weiyu, Deng Shuang Unit: Shanghai Normal University Tianhua College |
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