他在拳击比赛中途被击倒了。

He was ___knocked ___out halfway through the boxing match.

保安对闯入者的头部一击，便将其打晕。

The security guard ___knocked the intruder ___out with a single blow to the head.

为了自卫，她用一个重物成功击晕了袭击者。

In self-defence, she managed to ___knock her attacker ___out with a heavy object.