例句與造句

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
   網(wǎng)絡(luò)教學(xué)系統(tǒng)的主要邏輯單元包括：教師應(yīng)用單元、學(xué)生應(yīng)用單元、系統(tǒng)服務(wù)單元、系統(tǒng)數(shù)據(jù)單元和系統(tǒng)管理單元。
2. It's difficult to find system service unit in a sentence. 用system service unit造句挺難的