adj.地下的，秘密的，先锋派的，隐蔽的...

underground的近义词有：underground, subway, tube。下面这些名词均可表示"地铁"的含义：underground：一般用词，指城市中的地铁，主要用于英国。subway：指城市中的地铁或通道，主要用于美国。tube：主要用于英国口语中。...

The inves-tigators found that the underground pipes were badly corroded.调查人员发现地下管道严重腐蚀。A London Underground spokesman defended the decision to hold the train until police arrived.伦敦地铁公司的发言人为推迟发车直到警方赶来的决定作了辩解。London has a...

underground的音标：underground的英式发音音标为：['ʌndəgraʊnd]underground的美式发音音标为：['ʌndərgraʊnd]...

They are accused of organising and financing an underground youth movement.他们被指控组织并资助地下青年运动。The inves-tigators found that the underground pipes were badly corroded.调查人员发现地下管道严重腐蚀。Bus routes and railways, both overground ...