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| 单词 | lockdown |
| 释义 | lock·down (lŏkdoun′)n. 1. a. A protocol followed in an emergency that involves confining people in a secure place, such as the confinement of prison inmates in cells after a disturbance, or the locking of students and teachers in classrooms after a violent attack. b. A situation in which this protocol is undertaken. 2. A facility, such as a prison, where people considered to be dangerous are locked inside living quarters or otherwise confined. |
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