... 字母数字读出器 alphanumeric reader 字母数字符号 alphanumeric symbol 字母数字格式 alphanumeric style ...
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即使像字符替换大写字母和非字母数字符号，你就不会得到一个更强有力的密码。
Even with character replacements like capital letters and non-alphanumeric symbols, you're not getting a stronger password.
在一个方形图像内至多可编码约4,000个字母数字符号，它们刚刚好可以替代那种窄的收据条。
Able to encode a maximum of about 4,000 alphanumeric characters in a square image, they lend themselves nicely to placement on a narrow receipt slip.
不过想出一连串的字母数字符号往往烦人且让人来气，所以就有相对来说不多的人对此困惑不已。他们青睐简单易猜的单词来做密码。
But coming up with complex concatenations of alphanumeric symbols tends to be tedious and offputting, so relatively few people bother, plumping instead for simple, and easily guessable, words.
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