每次咳嗽前必须深深呼吸，并且每一次的咳嗽一定要深和长，就仿如要从胸膛深处咳出痰的情况一样。

A deep breath should be taken before each cough, and the cough must be deep and prolonged, as when producing sputum from deep inside the chest.

youdao

每次咳嗽前必须深深呼吸，并且每一次的咳嗽一定要深和长，就仿如要从胸膛深处咳出痰的情况一样。

A deep breath should be taken before each cough, and the cough must be deep and prolonged, as when producing sputum from deep inside the chest.

youdao