off guard

形容词 off guard:

1. not prepared or vigilant
   同义词：napping, off-guard, off one's guard, off his guard, off her guard, off your guard

1. 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。
2. In the second that the boxer was off guard, his opponent landed a knock out punch.
   拳击手未留意的那一刹那，对方即把他击倒了。
3. 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。
4. Seeing the opponent was off guarded, the boxer landed a knockout punch.
   乘对手不提防，那拳击手一下子把他击倒了。