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,臥底拍攝錄像的調查人員不肯透露自己的身份。好的,今天我們學習的詞是undercover...