検索内容:
(AmE) subway; (BrE) underground; (BrE) tube
I commute by subway every day.
department store's below-ground-level food section
I bought fresh fruits in the basement of the department store.
underground water
The underground water in this area is very clean and is used as drinking water.
underground nuclear test
It is reported that North Korea has conducted another underground nuclear test.
groundwater pollution, groundwater contamination
Groundwater pollution has become a serious environmental problem.
underground passageway
I went to the station through the underground passageway.
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