Yesterday we handed our dossier and the covert video recordings to the police. The Sun (2013)See covert video of the scam online. The Sun (2013)It suggested that police chiefs should be stripped of their role in setting standards for covert policing. Times, Sunday Times (2013)Relatives who suspect abuse are increasingly using covert filming to monitor loved ones. The Sun (2015)The frequency is hard to quantify, given covert police operations and other surveillance work. Times, Sunday Times (2011)But there was always the sense of a covert network of support, the possibility of refuge. HISTORY PLAY: The Lives and After-life of Christopher Marlowe (2004)I was on a covert filming assignment. Times, Sunday Times (2006)A covert campaign to position him for the leadership has been under way for at least three months. Times, Sunday Times (2013)We are making our dossier, including covert video recordings, available to police. The Sun (2014)The students, sneaking covert glances at us, could see that this was indeed entirely true. Times, Sunday Times (2006)She was just 24, and without any training in covert activity. Times, Sunday Times (2007)We hand him a camera, set up covert video inside the digger's cab and pass him the fake bomb. The Sun (2012)The inquiry began when a whistleblower reported concerns about the crime squad's methods and culture and included a ten-month covert phase using video and listening devices. Times, Sunday Times (2011)
较常使用。在柯林斯辞典中， covert 是1万个最常用词之一。
英式英语: covert ADJECTIVE
Covert activities or situations are secret or hidden.
They have been supplying covert military aid to the rebels.
covert 的定义—— 柯林斯 英语词典
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