明ㄇㄧㄥˊ查ㄔㄚˊ暗ㄢˋ訪ㄈㄤˇmíngchá‑ànfǎng

简明查暗访

  1. 公開調查，暗中尋訪。例 「經過長期的明查暗訪，真相終於大白」。

英open enquiries and secret search (idiom)​; to investigate openly and in secret, taking information from all sides