database manager的用法和样例：
例句
- A program that allows a user to perform work on a computer(in contrast to a program that performs overhead functions, such as an operating system). Examples are database managers, spreadsheets, and accounting programs.
使用户在计算机上完成工作的程序(不同于那种执行内务功能的程序，如操作系统)。例如数据库管理程序、数据表程序以及会计程序等等。
