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undercover

英 [ʌndə'kʌvə; 'ʌndə-] 美['ʌndɚ'kʌvɚ]

英英释义考试真题实用场景例句

adj. 秘密的，秘密从事的；从事间谍活动的

考试真题

Last year, the Transportation Security Administration ( ' , TSA) found in a secret check that undercover investigators were able to sneak weapons---both fake and real—past airport security nearly every time they tried.

Last year, the Transportation Security Administration found in a secret check that undercover investigators were able to sneak weapons—both fake and real—past airport security nearly every time they tried.