| 词组 |
under lock and key |
| 释义 |
●under ˌlock and ˈkeylocked up in prison, in a safe, etc. 被囚禁;锁在保险柜里◆The escaped prisoners are now safely under lock and key.现在逃犯们被严加看管。◆The exam papers must be kept under lock and key until half an hour before the exam.试卷必须严密保管,考试前半小时才能取出。 |

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