他缓缓地深吸了一口气。用英语怎么说？

他缓缓地深吸了一口气。

He took a long slow breath, inhaling deeply.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

took

v. 拿( take的过去式 )，接受，学习，取得；

例句
The interview took place on a Friday afternoon...
采访是在一个星期五的下午进行的。

long

adj. 长的，长时间的，冗长的，过长的，长音的；adv. 长久地，始终，遥远地；n. 长时间，长时期，[语]长音节，（服装的）长尺寸，长裤；vi. 渴望，极想；

例句
As long as most people are happy to have the monarchy, the abolitionist position is an arrogant fantasy.
只要大多数人还乐意保留君主制，废除它的主张就是痴人说梦。

slow

adj. 慢的，迟钝的，温和的，慢于…的；adv. 慢慢地，缓慢地；vt.& vi. （使）缓行，（使）减速；vi. 变慢，变萧条；vt. 放慢，阻碍；

例句
It's not a job for anyone who is slow with numbers...
这份工作不适合不擅长算术的人。

breath

n. 呼吸，一口气，呼吸力，微量；

例句
Take a deep breath and blow.
深呼吸，吐气。

inhaling

v. 吸入( inhale的现在分词 )；

例句
He took a long slow breath, inhaling deeply...
他缓缓地深吸了一口气。

deeply

adv. 在深处，浓浓地，强烈地，精心地；

例句
He was a man who abhorred violence and was deeply committed to reconciliation...
他是一个憎恶采用暴力而坚决主张和解的人。