backspace key meaning in English

反回键
返回键
回退键
退格键

If the backspace key is pressed in more than one second , the first item is selected
如果按backspace键的时间超过一秒，则选中第一项。
Use the mouse pointer ( or press the backspace key on your keyboard ) to fire up the engine
用鼠标指针（或按下退格键，你的键盘），以火了发动机。
If the backspace key is pressed in less than one second , the previous item is selected , or nothing is selected if the list of string is empty
如果按backspace键的时间小于一秒，则选中前一项；如果字符串列表为空，则不选中任何内容。
When the " input " option is selected the program uses the . getstr method , which provides field entry with crude editing capability you can use the backspace key
如果稍后希望加强安全性，则略去这个选项（需要使用valid users =那行来替换这行以真正加强安全性）。