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单词 Permutit
释义 Permutit/ˈpɜ:mjʊtit/n. propr. an artificial zeolite used as an ion exchanger esp. for the softening of water [商标]人造沸石,佩姆蒂特沸石(离子交换剂,尤用来软化水质) [German, from Latin permutare (as PERMUTE)]
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