at a moment's notice

基本解释

For us, everything is subject to change, and we can go anywhere at a moment's notice.
对我们来说，任何事都是容易发生变化的，我们可以在收到通知后立即去任何地方。
The entire organization has to be ready to adapt to all of these changes at a moment's notice.
整个组织不得不准备好即刻适应所有的这些变更。
Seeing as paramedics have high stress jobs that require them to be on call and ready to save lives at a moment's notice, you might expect their mean annual salary to be higher.
可以看见的是，护理人员有如此高压力的工作，要求他们随叫随到，并时刻准备好立即抢救生命，你可能想象他们的工资应该会更高些。

"That was reassuring, but it also meant that if you were unidentified you had potential friendly fire not too far away at a moment's notice."
Secretary Clinton said Wednesday that Bosworth had been prepared to travel to North Korea "at a moment's notice" during his first mission to the region last week, but said he regrettably did not get an invitation to do so.

But the boat's not forgotten--it's docked right out back--so he can still take trips at a moment's notice.
FORBES: Home Fleet Home
Once you open your doors, get ready for your staff to walk out through them at a moment's notice.
FORBES: Magazine Article