您要查找的是不是：
- underground muon 地下μ介子
- Recently they have laid an underground pipeline. 最近他们铺设了一条地下管道。
- The missile is delivered from underground. 这种导弹由地下发射。
- They were suspected of underground activities. 他们被怀疑进行地下活动。
- Moles stay underground most of the time. 钱鼠大部分时间住在地下。
- He went underground to avoid capture. 他转入秘密工作以免被捕。
- The cavers discovered a vast underground chamber. 探穴人发现了一个地下大洞穴。
- The quickest way to go round the city is by underground train. 在这个城市四处走动最快的办法就是乘坐地铁。
- The mole bored (its way) underground. 鼹鼠在地下挖掘(路)。
- The prisoner escaped by digging an underground tunnel. 囚犯挖了一条地道逃跑了。
- Some miners were trapped underground after the collapse. 塌方后，有些矿工被困在地下。
- There is an underground car park near the supermarket. 这个超市附近有一个地下停车场。
- The revolutionist eluded capture for weeks by hiding underground. 那位革命者为避免被捕在地下躲藏了几个星期。
- He joined the underground to fight against the fascists. 他参加了地下组织与法西斯作战。
- I used to go to work by underground when I was in London. 我在伦敦时，通常乘地铁上班。
- An underground passage leads to the building across the street. 一条地下通道通到街对面的大楼。
- The spy never told his family about his underground activities. 这位间谍从未把他的秘密活动告诉家里人。
- There is an underground room in the old house. 在老房子里有一个地下室。
- Torrential rivers are rumbling deep underground. 急流在地下深处隆隆奔腾。
- The miners' families fear for the lives of the men trapped underground. 矿工家属为被困井下的工人的生命而担忧。
