He got a nasty knock on the head.

他头部遭到重重一击。

《牛津词典》

Be careful you don't knock your head on this low beam.

小心，别把头撞在这矮梁上。

《牛津词典》

The new findings confirm that the ancient bipedal dinosaur Stegoceras could knock out any of today's top head-butters.

新的发现证实古代两足生物剑角龙可以打败现今顶级的善于头部撞击生物。

youdao

The only worry for the Warriors was the injury to Phelps, who was stretchered off after receiving a nasty-looking knock to the head.

BBC: Wigan 30-14 Bradford

Murray has undergone an ankle x-ray, which has revealed no fracture, while Hook suffered a knock to the head and will undergo further assessment.

CNN: Lions warm-up for Test with sixth win

Scrum-half Mike Blair, who missed Saturday's game after suffering a head knock against the All Blacks, may be back in contention if he comes through a series of medical checks.

BBC: Scotland lose Scott MacLeod for Samoa Test