She slowly bled to death.

她慢慢地失血死去。

《牛津词典》

She had bled to death.

她最后流血至死。

youdao

I know that my son could have survived but my son bled to death.

我知道我的儿子本来能活下来，但是，却流血而死。

youdao

One patient bled to death when the chemical was injected into the aorta instead of the esophagus.

FORBES: Dangerous Devices

Had they not done that, American Special Forces trainers say, there is no doubt Mohammed would have bled to death.

NPR: Serious Injury a Daily Risk for Iraqi Soldiers

And no one came to help him as he bled to death on the pavement because they were afraid they would be killed, too.

NPR: Journalists Dodge Danger to Report on the Dead