I wish my mouth had a backspace key.
我多希望嘴上有个退格键。
Hit the backspace key on a computer or typewriter keyboard.
敲计算机或打字机上的退格键。
The Backspace key is really an Undo function, albeit a special one.
退格键实际上是一个撤销功能，虽然它非常特殊。
When a user mistypes, the Backspace key "undoes" the erroneous characters.
当用户输入错误时，可以按退格键“撤销”错误的字符。
When a user mistypes, the Backspace key "undoes" the erroneous characters.
当用户输入错误时，可以按退格键“撤销”错误的字符。
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