have an undercover operation
have an undercover operation
进行秘密行动
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The U.S. Fish and Wildlife Service and Justice Department have launched "Operation Crash" using undercover agents and electronic surveillance in an effort to stop the black market trade in rhino horns, which has led to poaching and has reduced the world's rhino population by more than 90 percent since 1970.
WSJ: 3 charged in smuggling horns of endangered rhinos