underground

1.地下的；地面以下的under the surface of the ground

2.秘密的，非法的，暗中的，地下的（尤指反政府的）operating secretly and often illegally, especially against a government

1.在地下；在地面下under the surface of the ground

2.隐蔽地；隐匿地in or into a secret place in order to hide from the police, the government, etc.

1.[sing]（城市的）地下铁路系统，地铁an underground railway/railroad system in a city

1.地下的

2.隐蔽的,秘密的,不公开的

3.先锋派的,颠覆性的,实验性的

4.地下组织的

1.地铁,地下铁道,英式英语用法

2.地下组织,地下活动

3.先锋派团体,先锋运动

4.地下,地下通道

1.在地下

2.秘密地,悄悄地,不公开地

1.located, happening, or operating beneath the surface of the earth

2.concealed and done in secret

3.separate from a prevailing social or artistic environment, and often exercising a subversive influence

4.of the secret organization

1.a railway system that runs below ground, mainly used in British English

2.a secret movement that aims to overthrow a government or fight against an occupying enemy

3.a movement or group that is separate from the prevailing social or artistic environment and often exerts a subversive influence

4.a subterranean space or channel

1.below the surface of the ground

2.in secret or in hiding