a spasm of coughing是什么意思？

a spasm of coughing

一阵咳嗽

spasm

n. 痉挛，抽搐，（能量、行为等的）突发，发作；

例句
I had slipped a disc and was frozen in a spasm of pain.
我有一个椎间盘错位了，疼得我动弹不得。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

coughing

v. 咳嗽( cough的现在分词 )，（从喉咙或肺中）咳出，（突然）发出刺耳的噪音；

例句
I started coughing blood so they transferred me to a hospital.
我开始咯血，于是他们把我转到了医院。