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His cough is more like wheezing.
He has to breathe through his mouth.
He is short of breath, even when he has not been exercising, he is breathless.
His nose stuffed up when he had a cold.
He coughs up a lot of phlegm thick spit on most days.
He has a feeling of tightness in the chest or a feeling that he is suffocating.
His cough is dry, producing no phlegm.
He has coughed up blood.
His breathing has become increasingly difficult.
v.喘息，发出呼哧呼哧的喘息声( wheeze的现在分词 );哮鸣
He was coughing and wheezing all night. 他整夜又咳嗽又喘。
A barrel-organ was wheezing out an old tune. 一架手摇风琴正在呼哧呼哧地奏着一首古老的曲子。 来自《现代汉英综合大词典》
After a few weeks with her parents, she felt she was suffocating.和父母呆了几个星期后，她感到自己毫无自由。
That's better. I was suffocating in that cell of a room.这样好些了，我刚才在那个小房间里快闷死了。