cursor mark

例句：

1. 1.The cursor moved over the text as she typed.
   当她打字时，光标在文本上移动。
2. 2. The program uses a cursor to select and edit text.
   该程序使用光标来选择和编辑文本。
3. 3.The cursor is used to indicate where the user wants to focus on in the document.
   光标用于指示用户想在文档中聚焦的位置。