on your toes

adj. 警觉的(随时准备行动的, 急欲)

例句与用法：

Keep on your toes, lads, the attack is expected at any moment.

小伙子们，要保持警觉，敌人随时可能来袭。

The Chairman's visiting the warehouse today, so keep on your toes and be ready to answer any questions.

董事长今天会来看看仓库，你们要当心，要有准备，好回答他随时提出的问题。

In some of these guessing games you need to be on your toes all the time.

在有些猜谜游戏中，你必须始终积极开动脑筋。

"The Chairman's visiting the ware house today, so keep on your toes and be ready to answer any questions."

"董事长今天要来仓库参观，所以你们要小心点，准备回答任何问题。"