navigation
词形变化：
同义词：
flotilla | fleet | armada | merchant marine | marine | blue | merchant navy | argosy | destroyer | battleship | convoy | squadron | service | lazuline | dark blue | aircraft carrier | sea force | task force | midnight blue | ink blue | forces | aircraft | merchant | force | task | defense | sea | carrier | naval | ink | dark | midnight | USN | US Navy | navy blue | United States Navy |
反义词：
Army |