不备

[bù bèi]

• unprepared
• off guard

参考释义

不备 [bù bèi]

• -

例句

1. 他乘其不备击中了他。
   He hit him when his guard was down.
2. 有两个男孩子趁我们不备，偷了我们的箱子就跑了。
   Two boys made off with our cases while we weren't looking.