查词历史：: undercover underachiever

undercover

[英] [ˌʌndəˈkʌvə] [美] [ˌʌndɚˈkʌvɚ] 生词本

adj. 暗中进行的，秘密的；秘密从事的；私下的，隐蔽的；从事间谍活动的

n. 卧底

柯林斯高阶英汉双解学习词典

《柯林斯COBUILD高阶英汉双解学习词典》（Collins COBUILD Advanced Learner's English-Chinese Dictionary）是柯林斯公司携手外研社为中国学习者量身定制的全新版本，突出强调了学习型词典的学习功能，同时在可读性和易用性方面均有大幅提升。
英英释义
词典例句

词霸2012 v1.2版丰富词典内容优化真人发音

1. ADJ 秘密的;密探的;卧底的 Undercover work involves secretly obtaining information for the government or the police.

...an undercover operation designed to catch drug smugglers.

抓捕毒贩的秘密行动
...undercover FBI agents.

联邦调查局的密探
...undercover reporters.

卧底记者
Undercover is also an adverb.
- Swanson persuaded Hubley to work undercover to capture the killer.
  
  斯旺森说服赫布利去做卧底以便将凶手抓获。

Adjective

1. conducted with or marked by hidden aims or methods;

"clandestine intelligence operations"
"cloak-and-dagger activities behind enemy lines"
"hole-and-corner intrigue"
"secret missions"
"a secret agent"
"secret sales of arms"
"surreptitious mobilization of troops"
"an undercover investigation"
"underground resistance"

synonym： clandestine，cloak-and-dagger，hole-and-corner(a)，hugger-mugger，hush-hush，on the quiet(p)，secret，surreptitious，underground

1. A federal judge upheld the undercover methods used in the case.: 一位联邦法官主张在此案中使用秘密的方法。