normal to screen的用法和樣例：
例句
- Furthermore, an assistive device like a screen reader will read ALL of the navigation every single time.
并且類(lèi)似于屏幕閱讀器的輔助工具，每時(shí)每刻都在閱讀導航內容。 - This window becomes a direct descendant of the root window, until it is first mapped on the screen.
這個(gè)窗口成為根窗口的一個(gè)直接的后代，直到它第一次映射于屏幕上。
