“nonmetallic ore for gemstone”的概念、定义、翻译、参考文献-科学参考

单词	nonmetallic ore for gemstone
释义	nonmetallic ore for gemstone Encyclopedia 理学非金属矿产资源释 nonmetallic ore for gemstone宝石原料用非金属矿经琢磨后能作为饰物的矿物。
随便看	closed edge train closed elastic drive closed element closed embedding closed-end fund closed equivalence relation closed expression closed extension closed family of sets closed field closed filament closed filter closed fishing areas closed fishing season closed-flux device closed fork mounting closed form closed-form number closed-form solution closed formula closed fuel cycle closed function closed geodesic closed graph closed-graph mapping

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