“United States naval observatory time”的概念、定义、翻译、参考文献-科学参考

单词	United States naval observatory time
释义	United States naval observatory time Encyclopedia 工学时间系统释 United States naval observatory time；USNO美国海军天文台时美国海军天文台（USNO）产生和保持的协调世界时（UTC），也是美国国防部的标准时间。
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