名词

1. （陆军、海军陆战队、空军）中尉，少尉；（海军）上尉；（美国警察的）警督，小队长
A lieutenant is a person who holds a junior officer's rank in the army, navy, marines, or air force, or in the American police force.

2. 助理；（尤指）副职
If you refer to someone as a person's lieutenant, you mean they are that person's assistant, especially their main assistant, in an organization or activity.

1. an assistant with power to act when his superior is absent

Synonym: deputy

2. an officer in a police force

Synonym: police lieutenant

3. a commissioned military officer

4. an officer holding a commissioned rank in the United States Navy or the United States Coast Guard
below lieutenant commander and above lieutenant junior grade