单词：po 

名词

• 
  [1.n.po] (同义词:[polonium( n. [化] 钋 )]  [Po(n. pos 便壶，夜壶 )]  [atomic_number_84]  )
• 
  注释列句：a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
• 上位词 -> [metallic_element]  [chemical_element]  [substance( n. 物质, 实质, 主旨 )]  [matter( n. 事件, 问题, 物质, 内容, 实质, 原因, (印刷或书写的)文件, (文章或讲话等的)素材 vi. 有关系, 要紧 )]  [physical_entity]  [entity( n. 实体 )] 
• 
  [2.n.po] (同义词:[petty_officer(n.(海军的)士官, 公务员 )]  [PO(n. pos 便壶，夜壶 )]  [P.O.(abbr.Postal Order 汇票 )]  )
• 
  注释列句：a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army
• 上位词 -> [noncommissioned_officer(n. 军士，士官 )]  [military_officer(n.军官 )]  [serviceman( n. 军人, 修护人员 )]  [skilled_worker(技术工人 )]  [worker( n. 工人 )]  [person( n. 人, 身体, 容貌, [语法]人称 )]  [organism( n. 生物体, 有机体 )]  [living_thing]  [whole( n. 全部, 全体, 整体, 完全之体系 adj. 所有的, 完整的, 完全的, 纯粹的, 未损伤的, 未打破的 adv. 完全, 整个 )]  [object( n. 物体, 目标, 宾语, 对象 vi. 反对, 拒绝, 抗议 vt. 提出...来反对 )]  [physical_entity]  [entity( n. 实体 )] 
• 下位词 -> [master-at-arms(n.纠察长, 卫兵士官 )]  [senior_chief_petty_officer] 
  
• 
  [3.n.po] (同义词:[Po(n. pos 便壶，夜壶 )]  [Po_River]  )
• 
  注释列句：a European river; flows into the Adriatic Sea
• 实 例 -> [river( n. 河, 江 )] 
  部分总称 -> [Italy( n. 意大利(欧洲南部国家) )] 
  所有总称 -> [Italy( n. 意大利(欧洲南部国家) )] 
  
• 
  [4.n.po] (同义词:[United_States_Post_Office]  [US_Post_Office]  [Post_Office(n.邮局 )]  [PO(n. pos 便壶，夜壶 )]  )
• 
  注释列句：an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States
• 上位词 -> [independent_agency]  [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 )]