cold case
US /ˈkoʊld keɪs/
UK /ˈkoʊld keɪs/
1.
悬案, 未侦破案件
an unsolved criminal investigation that has been closed but could be reopened if new evidence emerges
:
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Detectives reopened the cold case after a new witness came forward.
一名新证人出现后，侦探们重新启动了这起悬案。
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The documentary explored several famous cold cases.
这部纪录片探讨了几起著名的悬案。