system maintenance的用法和樣例：
例句
- The security center does not give any system maintenance information and users had to look for those information in other places inside Control Panel.
安全中心並沒有給任何系統維護，信息和用戶不得不尋找這些信息在其他地方在控制面板。 - The system maintains an internal list that contains the child controls associated with a parent window.
系統維護包含與父窗口關聯的子控制項的內部列表。
