In my reply, I just tap the curser to see the 'select, select all and paste' commands.
在我的回复信件中，我只要在空白处点击屏幕，出现“选择、选择全部或粘贴”的工具栏后，点击粘贴即可。
The optical indicator is used for projecting the external curser onto the imaging plane.
光学指示器用于将外部光标投影于显像平面上。
The device can be hooked up to special software and used to move a curser on a computer screen or control a wheelchair.
这个感应器和特定的软件绑定后就可以移动电脑光标或者控制轮椅。
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