We have given them advance warning.

我们已向他们预先发出警告了。

QUESTION: On the exercise did you guys have advance warning?

提问：这个演习有提前发布通知吗？

There was no advance warning before the earthquake hit.

地震之前没有任何预兆。

Advance warning is the ultimate prize for earthquake studies.

预警是研究地震的最终目标。

Please give us advance warning of any changes to the schedule.

工作日程如有改动，请事先通知我们。