他在第二回合中被击倒。 He was KO'd (ie knocked out) in the second round.
那暴徒对着年轻小伙子的背猛击一拳，那小伙子却转过身去加倍回击，将他击倒。 The bully punched the young lad in the back, who turned round and paid him back with interest by knocking him out.
判败击倒在拳击比赛中，对手在被击倒后的一定时间未能从拳台上站起来而取得的胜利 A victory in boxing in which one's opponent is unable to rise from the canvas within a specified time after being knocked down.
数十从一秒数到十秒，在此期间被击倒的拳击手必须站起来，不然便被宣布失败 The counting from one to ten seconds, during which time a boxer who has been knocked down must rise or be declared the loser.
他一记有力的左手拳将对手击倒。 He knocked down his opponent with a powerful left.