每日一詞 403 undercover：秘密的，暗中進行

今天我們要學的詞是undercover。 Undercover, 是指秘密的，暗中進行的。"An undercover operation," 就是一次秘密行動。最近，美國農(nóng)業(yè)部宣布回收1億4千3百萬磅牛肉。"An undercover video showed that cows too sick to stand were slaughtered for human consumption," 因為一部秘密拍攝的錄像顯示，加州一家屠宰廠非法宰殺了很多病得站不起來的牛，并將牛肉送入市場。"The undercover investigator refused to disclose his identity for fear of retaliation," 因為擔心報復，臥底拍攝錄像的調(diào)查人員不肯透露自己的身份。好的，今天我們學習的詞是undercover...