在《PONS词典》中的词汇
I. ˈunder·ground 形
II. ˈunder·ground 副
under·ground ˈrail·way 名词
- underground railway
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underground stream, underground aquifer [ˈækwɪfə] 名词
- underground stream
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ground water, underground water 名词
underground economy 名词 美 经济法
- underground economy
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underground railway ÖPV
- underground railway
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