英语释义
1
n a company that performs a public service; subject to government regulation
2
n the quality of being of practical use
3
n the service (electric power or water or transportation) provided by a public utility
4
n (economics) a measure that is to be maximized in any situation involving choice
5
n (computer science) a program designed for general support of the processes of a computer
6
n a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal