at very short notice

基本解释

“Only they are able to provide almost unlimited system-wide liquidity at very short notice,” says Jaime Caruana, the BIS’s general manager.
“只有他们能够在没有事先通知的情况下提供系统级的流动性，”国际清算银行的总经理卡鲁阿纳说。
He told them he was a "special Swiss representative in crisis zones", which enabled him to flit between the women at short notice and with very little explanation.
他告诉她们，他是一名瑞士派往危机地区的特使，借此为由可以使他辗转腾挪于这些受害富女之间，突然出现或消失无需解释，来去自如。
OIOS was informed that reassignments between teams have been done at times without discussion with either staff or team leaders and in several instances on very short notice.
监督厅得知，经常未经与工作人员或者小组组长讨论便在小组之间进行人员调动，而且好几次都只给了很短的通知。

Apple forced Nokia into launching its app store, Ovi, at very short notice and Ovi was an unmitigated disaster when set alongside iTunes.
FORBES: What's Really Going On At Apple?
That task fell to a UNESCO-funded Jordanian consultant, Khuzaima El-Jallad, who undertook a mission to Afghanistan at very short notice to ensure that the 8th March deadline could be met.
UNESCO: Communication and Information
Mr. GEORGY MIRSKY (Institute of World Economy and International Relations): I am absolutely certain that Iran is out to produce an atomic bomb, or to reach a stage of technological developments which makes it possible for it to produce a bomb at very short notice.
NPR: Iran Refuses Key Condition in Russia Nuclear Talks