He flattened the intruder with a single punch.

他一拳就把闯入者打倒在地。

《牛津词典》

He laid his opponent low with a single punch.

他一拳就把对手打倒在地。

youdao

Eventually McCoy's patience snapped and he knocked the drunk out with a single punch.

麦科伊忍耐不住，只一拳，就把他打昏了。

youdao

Frustrated that his cast couldn't fit the dialogue into a single shot, Mr. Eastwood took a cue from Howard Hawks's fast-talking screwball comedy to punch up a brooding Boston-set crime melodrama.

WSJ: Conserving the Horse He Rode in On