a heads-up

Thanks for the heads-up about the system outage this morning.谢谢你提前告知我今天早上的系统故障。

She appreciated the heads-up before the difficult meeting, as it allowed her to prepare her response.她很感谢有人在那场棘手的会议前提前提醒了她，因为这样她就能准备好如何回应。