单词：utc 

名词

• 
  [1.n.utc] (同义词:[coordinated_universal_time]  [UTC(=United Technology Corporation联合技术公司[美] )]  )
• 
  注释列句：Greenwich Mean Time updated with leap seconds
• 上位词 -> [Greenwich_Mean_Time( n. 格林尼治标准时间(=G.M.T.) )]  [time]  [attribute( n. 属性, 品质, 特征, 加于, 归结于 )]  [abstraction( n. 提取 )]  [entity( n. 实体 )] 
• 下位词 -> [Earth-received_time]  [transmission_time]  [spacecraft_event_time]