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1.The metallurgist used an unglazed crucible to melt the ore.
冶金学家使用一个无釉坩埚来熔化矿石。
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2.The scientist conducted experiments using a standard unglazed crucible.
科学家使用一个标准的无釉坩埚进行实验。
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3. The engineer designed a new type of unglazed crucible for better heat transfer.
工程师设计了一种新型的无釉坩埚,以改善热传导。