| 单词 | air alert |
| 释义 | air alert (once / 2363863 pages) n WORD FAMILY air alert USAGE EXAMPLES"At one point the entire state was under extreme air alert," Steve Mikkelson, a spokesman for the Minnesota Pollution Control Agency, said Wednesday. Los Angeles Times(Jul 08, 2015) 1n the time period during which military and civilian agencies are prepared for an enemy air attack Hyper period, period of time, time period an amount of time 2n the warning signal that begins a period of preparation for an enemy air attack Hyper alarm, alarum, alert, warning signal an automatic signal (usually a sound) warning of danger 3n the condition in which combat aircraft are airborne and ready for an operation aircraft in the Mideast are on air alert Hyper alert, qui vive condition of heightened watchfulness or preparation for action |
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