The system has three components: the query subsystem, the database subsystem and the retrieval subsystem.

该系统分为查询界面子系统、数据库子系统和检索子系统三大部分。

youdao

The system has three components: the query subsystem, the database subsystem and the retrieval subsystem.

该系统分为查询界面子系统、数据库子系统和检索子系统三大部分。

youdao