knockout
剑桥词典
knockout noun [C] (UNCONSCIOUS)
in boxing , the act of hitting the other fighter so that they fall to the ground and are unable to get up again within ten seconds
（拳击中的）击败对手的一击，击倒对手获胜
a knockout punch /blow 使人倒地不起的一击
也见 knock sb out (MAKE UNCONSCIOUS)
knockout noun [C] (COMPETITION)
(US elimination tournament)a competition in which only the winners of each stage play in the next stage , until one competitor or team is the final winner
淘汰赛
The tournament is a straight knockout. 这次锦标赛是直接淘汰赛。
a knockout competition /championship 淘汰赛／锦标赛
knockout noun [C] (ATTRACTIVE)
informala person or thing that looks , sounds , etc. extremely attractive
极有吸引力的人（或物）
Your sister's a real knockout! 你的妹妹真是令人着迷！