undergroundun•der•ground /ˌʌndə'ɡraʊnd/

adv

1. 地(面)下地,往(地面)下地

• Some litter was buried underground on the outskirts. 有些垃圾埋在郊外。

2. 隐蔽地,秘密地

• The suspect went underground to avoid the police. 那名嫌疑犯为了躲避警察的追捕藏了起来。