trung úy
/ˌfɜːst lefˈtenənt//ˌfɜːrst luːˈtenənt/The term "first lieutenant" originated during the 17th century when military forces in Europe began to adopt more organized and hierarchical structures. In these armies, the position of lieutenant, meaning "someone who is deputized to specify orders," came into existence. Among the lieutenant corps, the first one to be promoted was called a "first lieutenant," which denoted a higher rank and greater level of responsibility. In many European countries, particularly in the British and French armies, this rank became a step between second lieutenant and captain. During colonial expansion, British and French forces brought this system to their colonies, where it was adapted and modified based on the specific needs of the territories. In the United States, the term "first lieutenant" was officially established as a part of the US military rank system in 1815. In modern military organizations around the world, the role of a first lieutenant includes supervising and mentoring junior officers and enlisted personnel, as well as serving as a company assistant to the captain or major. While the specific duties and responsibilities of a first lieutenant may vary between armed forces, the rank signifies a crucial middle management position between the junior lieutenant and the senior captain.
an officer in the navy with responsibility for managing a ship, etc. under the guidance of the captain
một sĩ quan trong hải quân có trách nhiệm quản lý tàu, v.v. dưới sự chỉ đạo của thuyền trưởng
an officer in the US army and air force just below the rank of a captain
một sĩ quan trong quân đội và không quân Hoa Kỳ có cấp bậc thấp hơn một đại úy
a person who is the next most important to somebody
một người là người quan trọng thứ hai đối với ai đó
