undercover
undercover基本解释
adj.从事秘密工作的；秘密的
undercover同义词
undercover相关例句
undercover英英释义
"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"
