... alphabetic character 字母符号 alphabetic characters 字母数字符 alphabetic code 字母码 ...
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字母数字符号 [计] alphanumeric symbol ; alphanumeric notation
字母数字符号集 alphameric character set
非字母数字符号 non-alphameric sign
字母数字字符集 [计] alphanumeric character set
字母数字符号表示法 alphanumeric representation
字母数字字符 [计] alphanumeric character
字母数字式字符 alphanumeric character
字母数字字符子集 [计] alphanumeric character subset
字母数字及特殊字符型 Alphanumeric Special
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.
一台大型计算机的即时存取存储器可容纳多达100000个“单词”——字母或数字字符的字符串——随时可用。
The instant access memory of a large computer may hold up to 100,000 "words"—string of alphabetic or numerical characters—ready for instant use.
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