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calc-tufa是什么意思

calc-tufa

美['kælkˌtuːfə]  英['kælkˌtuːfə]
n.  [化]石灰华
  异体字:calc-tuff
  近义词:tufa,

英英释义

Noun
  1. a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
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