“美国海军天文台时”的概念、定义、翻译、参考文献-科学参考

单词	美国海军天文台时
释义	美国海军天文台时 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。
随便看	closed pipe closed plane closed pneumothorax closed point closed point set Closed Population closed power station closed professional sports league closed pseudo-manifold closed quadrature formula closed quantum system closed range theorem closed ray closed region closed reserve system closed resonator closed Riemann surface closed ring closed scheme closed season closed semicircle closed semigroup closed semisphere closed sentential formula closed sequence

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。