first lieutenant
noun /ˌfɜːst lefˈtenənt/
/ˌfɜːrst luːˈtenənt/
- an officer in the navy with responsibility for managing a ship, etc. under the guidance of the captain
Topics War and conflictc2舰务官 - an officer in the US army and air force just below the rank of a captain
Topics War and conflictc2(美国陆军和空军的)中尉 - (informal) a person who is the next most important to somebody
第二把手