Level 3 · word 2,843 of 20,000
underground
/ˌʌndərˈɡraʊnd/
American
- adj. 地下的, 秘密的
- n. 地铁, 秘密组织
- Definition
- adj. below the surface of the ground, or done secretly
- n. a railway system that runs below the ground, or a group that acts secretly against authority
- Example
- Workers built a tunnel deep underground for the new subway.
- 工人们在地下深处挖了一条隧道，用来修建新地铁。