off-guard

常见例句

Don't be off guard! You mustn't tell anything to him.
不要失去警惕，你一定不要告诉他任何事情。
If you should be off guard, you would double the loss.
如果你粗心大意，你一定会加倍损失。
Seeing the opponent was off guard, the boxer landed a knockout punch.
乘对手不提防,那拳击手一下子把他击倒了。
Caught off guard, the competition never caught up.
其竞争对手在未加提防情况下遭受重击,因而永远无法赶超。
He struck me while I was off guard.
他乘我不备打了我。
His purpose is to catch us off guard.
他的目的是想让我们失去警惕。