navy  
 noun uk/ˈneɪ.vi/ us/ˈneɪ.vi/
  (SEA FORCE)      
 B2 [ S, + sing/pl verb ]海军 
the part of a country's armed forces that is trained to operate at sea
  My brother is an officer in the Navy. 我兄弟是海军军官。 
 Gabriel joined the navy in 1997. 加布里埃尔于1997年加入海军。 
 a navy ship/vessel 军舰 
 - More examples
 - They both enlisted in the navy a year before the war broke out.
 - My grandfather used to reminisce about his years in the navy.
 - The navy plans to move its Tridents.
 - The U.S. Navy entered combat in South Vietnam in 1964.
 - The navy's largest ship was destroyed in the attack.
 
  (COLOUR)     
B1 [ U ] (also navy blue)深蓝色,海军蓝 
dark blue
 navy       
adjective uk/ˈneɪ.vi/ us/ˈneɪ.vi/ (also navy blue)
 深蓝色(的),海军蓝(的)
dark blue
  He was wearing a navy sweater. 他穿着一件深蓝色的毛线衣。