He felled his opponent with a single blow.

他一拳击倒了对手。

《牛津词典》

He was knocked out by a single blow to the head.

他头上只被打了一下便昏过去了。

《牛津词典》

Next year, we sacrifice love cannot withstand a single blow.

明年的今天，祭祀我们不堪一击的爱情。

youdao

He said the world knows of her because of a single act of bravery that struck a deadly blow to racial hatred.

VOA: special.2009.03.08

At first, it appeared the referee just had minor injuries from the single blow.

NPR: Utah Referee Critically Hurt By Soccer Game Punch

He was killed with a single blow from the wide end - or adze - of the axe.

BBC: NEWS | UK | England | Merseyside | Walker killing: prosecution case

Owen is one of a handful of baseball players who, despite otherwise solid careers, are remembered as goats thanks to a single play that helped blow a big game for his team.

FORBES: Magazine Article