backspace key

基本解释

Use key 'BACKSPACE' for an UNDO mode, and 'ESC' to end the game.
使用关键的' 退格'一个撤消模式，和'ESC的结束比赛。
And pressing the Backspace key deletes the character before the insertion point.
退格键可删除插入点之前的字符。
If you made a mistake, you didn't have any of these modern features like a backspace key to correct it. You threw away the card and started over.
那时可没有任何类似“退格”键（Backspace key）这样的现代化功能，如果你出错了，就没有办法更正，只好扔掉出错的卡片，从头再来。
feihen1.blog.163.com

In this case, though, there's a split space bar, whose left end can be programmed as a backspace key (Microsoft's rationale is that your fingers are constantly near the space bar anyway).
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We were using typewriters, where the state of the art way to correct a typo was to backspace and put a strip of white paper behind the key and retype the word.
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