undercover operation

1. He's about to go undercover in a high-risk operation.
   他要进行一次非常危险的秘密行动。
2. We are mounting an undercover operation that we hope will lead us to him through this man.
   我们组织了一次秘密行动希望能够找到他。
3. In course of undercover operation, other acts of obtaining evidence in covert investigation are usually utilized.
   在卧底侦查实施过程中，侦查人员常常结合运用技术性秘侦取证行为获取证据。
4. In order that undercover operation effectively conducts, statute in some nations expressly exempts undercover agents from indispensable illegal acts.
   为了确保卧底侦查的顺利开展，有些国家立法在必要范围内明确豁免侦查人员的违法犯罪行为。文章接着论述诱惑侦查这一秘侦取证行为。

noun

1. an operation involving secret work within a community or institution