You must be ready to leave at a moment's notice.

你必须随时准备出发。

《牛津词典》

I suggest you notice your manager at least one day in advance if you have any leave plan.

如果你有任何的休假计划，我建议你至少提前一天通知你的负责人。

youdao

He took no notice of his wife's threat to leave him.

他对妻子要离开他的威胁没有在意。

youdao

You may be spending many hours on the bus and will need to leave on short notice once we have the flight confirmed.

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No holidays or day trips will leave until further notice.

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The Bylaws provide for a member to leave the conference upon notice and payment of a specified fee.

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