使用不可打印的字符(例如退格键或暂停)可以提高密码的模糊度。

Requiring nonprintable characters, such as backspace or pause, is a simple way to add another layer of obfuscation to your password.

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比赛一退格如果在字符匹配模式。

Match a backspace if in character matching mode.

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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.

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