| 单词 | red alert |
| 释义 | red alert (once / 104596 pages) n WORD FAMILY red alert USAGE EXAMPLESA total of 24 cities are under a pollution “red alert,” the highest warning level in China’s four-tiered system. Washington Times(Jan 03, 2017) The “orange alert” is the third level, preceding a “red alert,” in China’s four-tiered warning system. Washington Times(Jan 02, 2017) A red alert is the highest level of a four-tier warning system introduced as part of China’s high-profile war on pollution. The Guardian(Jan 01, 2017) n the highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger) Hyper alert, qui vive condition of heightened watchfulness or preparation for action |
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