单词：usn 

名词

• 
  [1.n.usn] (同义词:[United_States_Navy]  [US_Navy]  [USN(abbr.United States Navy 美国海军 )]  [Navy( n. 海军 )]  )
• 
  注释列句：the navy of the United States of America; the agency that maintains and trains and equips combat-ready naval forces
• 上位词 -> [agency( n. 代理处, 行销处, 代理, 中介 )]  [administrative_unit]  [unit( n. 个体, (计量)单位, (军队的)部队单位, [数学]最小的整数 )]  [organization( n. 组织, 机构, 团体 )]  [social_group]  [group( n. 团体, 组, 团, 群, 批, [地]界, [化]基 v. 聚合, 成群 )]  [abstraction( n. 提取 )]  [entity( n. 实体 )] 
• 所有相关单词 -> [Naval_Research_Laboratory]  [United_States_Marine_Corps]  [Naval_Air_Warfare_Center_Weapons_Division]  [Naval_Special_Warfare]  [Naval_Surface_Warfare_Center]  [Naval_Underwater_Warfare_Center]  [United_States_Naval_Academy]  [Office_of_Naval_Intelligence] 
  部分总称 -> [Department_of_Defense] 
  所有总称 -> [Department_of_Defense]