system service unit造句

例句与造句

1. The major logical units of the wbis include the application unit for teachers , the application unit for students , the system service unit , the system database unit and the system administration unit
   网络教学系统的主要逻辑单元包括：教师应用单元、学生应用单元、系统服务单元、系统数据单元和系统管理单元。
2. It's difficult to find system service unit in a sentence. 用system service unit造句挺难的