1.  backspace
2.  BS
3.  BK
4.  bksp

• 1. 退格: Back Space
• 2. 退格键: BackSpace | backspace character
• 3. 退格符: backspace character

更多释义

• 1.即使受到监视，普通攻击者也会因退格键的存在而受阻。
  Even if monitored, a casual attacker will be stymied by the presence of backspace.
  dict.yoduao.com
• 2.默认情况下，你可以使用光标和退格键来移动和编辑输入行。
  By default, you can use the cursor keys, and backspace, to move around and edit the input line.
  dict.yoduao.com
• 3.当我们按下退格键，行长度从80缩短到79时，高亮部分就会消失。
  The highlight will disappear the moment we enter a backspace and the line length reduces to 79 from 80.
  dict.yoduao.com

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