normal to screen

• 垂直于屏幕

normal to screen的用法和样例：

例句

1. Furthermore, an assistive device like a screen reader will read ALL of the navigation every single time.
   并且类似于屏幕阅读器的辅助工具，每时每刻都在阅读导航内容。
2. This window becomes a direct descendant of the root window, until it is first mapped on the screen.
   这个窗口成为根窗口的一个直接的后代，直到它第一次映射于屏幕上。