He gave a deep sigh.

他深深地叹了一口气。

《牛津词典》

He heaved a deep sigh; a long, long, long sigh.

他长叹一声；一声很长很长很长的叹息。

youdao

"Once," said the Mock Turtle at last, with a deep sigh, "I was a real Turtle."

最后，假海龟终于开口了，它深深地叹了口气，说：“以前，我是一只真海龟。”

youdao

Kaimowitz lets out a deep sigh.

NPR: Autism Movement Seeks Acceptance, Not Cures

And the stage was set for a incredible finale when Jackson intercepted from deep but his attack fizzled out, leaving Bath breathing a sigh of relief.

BBC: Bath 35-31 Glasgow Warriors