"at a moment's notice" in Chinese (Simplified)
随时立刻
Definition
非常迅速，几乎没有提前通知或准备的时间。
Usage Notes (Chinese (Simplified))
固定短语，常用于表示事情可以非常快地发生，尤其是在紧急或需随时准备的情况下。比直接说“很快”更正式。常与“离开”、“取消”、“回应”等动词搭配。
Examples
He can leave at a moment's notice if needed.
他可以**随时**离开，如果需要的话。
The meeting can be cancelled at a moment's notice.
会议可以**随时**取消。
We are ready to move at a moment's notice.
我们**随时**准备搬迁。
His job requires him to travel at a moment's notice.
他的工作要求他能**随时**出差。
If there's an emergency, you must be able to act at a moment's notice.
如果有紧急情况，你必须能**立刻**行动。
My family could show up at a moment's notice, so I always keep the house tidy.
我的家人可能会**随时**来，所以我总是保持房子整洁。