在地下的英语可以用"underground"来表示。这个词的来源可以追溯到中世纪拉丁语的"undergrounda"，意思是"在地下的"或"地下的东西"。
下面是一些例句：
He pves in an underground bunker to avoid air raids. (他住在地下防空洞里，以避免空袭。)
The underground railway system is the fastest way to travel around the city. (地铁是环城旅行最快的交通方式。)
Some underground music genres are not well known to the mainstream audience. (一些地下音乐流派并不为主流观众所熟知。)
下面是一些例句：
He pves in an underground bunker to avoid air raids. (他住在地下防空洞里，以避免空袭。)
The underground railway system is the fastest way to travel around the city. (地铁是环城旅行最快的交通方式。)
Some underground music genres are not well known to the mainstream audience. (一些地下音乐流派并不为主流观众所熟知。)