地下
dìxià
HSK 5
地下 — dìxià
- underground; subterranean; covert
地铁站常常建在城市的地下。 dìtiězhàn chángcháng jiànzài chéngshì de dìxià — Subway stations are often built underground in cities.
- the underground (hidden activities, e.g. clandestine groups or networks)
那家工厂有地下劳工的报道引起了公众关注。 nàjiā gōngchǎng yǒu dìxià láogōng de bàodào yǐnqǐ le gōngzhòng guānzhù — Reports of underground (clandestine) labor at that factory drew public attention.