She banged her head and lost consciousness.

她撞了头，失去了知觉。

《柯林斯英汉双解大词典》

I can't remember any more—I must have lost consciousness.

我想不起来了—我当时一定是失去了知觉。

《牛津词典》

When the patient was taken to hospital, he had already lost consciousness.

送到医院，人已经昏迷过去了。

《新英汉大辞典》

These people temporarily lost consciousness after suffering a blow to the head.

VOA: special.2009.04.07

The 42-year-old lost consciousness before the accident last April, the Crown Prosecution Service (CPS) said.

BBC: Seaham crash 'caused by lorry driver's coughing fit'

Ms Hickman remained on the phone until 16.49, a total of 28 minutes, when she finally lost consciousness.

BBC: Lakanal House fire: Victim's desperate 999 call

The referee could also stop a bout when a fighter could no longer protect himself or lost consciousness.

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