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limestone

/ˈlaɪmˌstoʊn/ 名词 B2

中文: 石灰岩、灰岩、青石

  1. An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO₃); and occurring in a variety of forms, both crystalline and amorphous. (countable, uncountable) · a limestone viaduct

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