naphthenic content of oil
基本释义
油中环烷含量
实用场景例句
博物馆导览
The guide discussed the numismatic significance of the ancient medals in the collection.
向导讨论了收藏中古代奖牌的钱币学意义。
历史研究
The numismatic expert analyzed the coin's origin based on its mint marks.
钱币学家根据铸币标记分析了硬币的来源。
收藏家交流
The numismatic enthusiast shared his findings on rare currency during the conference.
收藏家在会议上分享了关于稀有货币的研究成果。
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