under lock and key

介词短语
中文释义

英文释义

介词短语
  1. Imprisoned with little or no chance of escape; locked up. UK,US,idiomatic
    — If it was him we can have him under lock and key in 24 hours.
  2. Safely guarded; locked away. UK,US,idiomatic
    — It is the policy of the organization to keep unused check supplies safeguarded under lock and key.
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