undercover

US /ˌʌndərˈkʌvə(r)/

UK /ˌʌndəˈkʌvə(r)/

B2 中高級
adv.副詞秘密從事的;私下進行的
Undercover police officers, posing as electricians, found marijuana growing in the man's home
adj.形容詞臥底的
He worked as an undercover police officer for several years.

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nigahiga: 神秘特務 (Agents of Secret Stuff)

35:01nigahiga: 神秘特務 (Agents of Secret Stuff)