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tufa

英 ['t(j)u?f?] 美['tj?f?]
  • n. [地質(zhì)] 石灰華；凝灰?guī)r；泉華
  • n. (Tufa)人名；(埃塞)圖法

英英釋意

1. a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
2. hard volcanic rock composed of compacted volcanic ash