Underground car井下汽车undergroundadj.地下的；秘密的adv.在地下；秘密地n.地下；地铁；地道；秘密活动underground continuous walt地下连续墙underground commercial zone地下商业underground eontinuous wall地下连续墙Underground Logistic System地下物流系统underground pipeline finder地下管线探测仪underground passing through地下穿越underground hauling of coal井下运煤underground illegal factory[法] 地下工厂underground railway station地下火车站Underground drip irrigation地下滴灌

1. Second,we had the support of the masses and the co-operation of underground Party members and guerrilla fighters.
   第二，群众支援，地下党和游击队之配合。
2. His father is a member of the underground.
   他父亲是一名地下组织的成员。
3. How did Russian underground find out about Rambaldi?
   俄国地下组织怎样知道兰巴迪的事情？