我给他当头一击，他就昏倒了。

I gave one for his nob and he fell senseless.

《新英汉大辞典》

那沉重的当头一击使他失去了知觉。

The nasty knock on the head bereft him of consciousness.

youdao

消防员说龙卷风给了他们当头一击。

The firemen said that the tornado hit them head on, a direct hit.

youdao

他们当头一击把他 打昏过去 。

They stunned him with a blow on the head.

youdao

当头一击把他打得头晕眼花。

The blow on the head dazed him.

youdao

杰克当头挨了一击，眼睛直冒金星。

The blow on his head made Jack see stars.

youdao

杰克当头挨了一击，眼睛直冒金星。

The blow on his head made Jack see stars.

youdao