Examples (1-5 of 5)

at short/a moment's/24 hours' notice

一经通知就/马上就/24小时内就

on presentation of...

[+voucher，invitation] 一经出示…

on production of

一经出示

We will prepare for our departure as soon as we get the approval.

我们一经批准就开始准备出发。

These are loans that the banks can reclaim on demand.

这些是银行一经要求即可收回的贷款。