numerical letter sequent code 数值化字母顺序码
The first line contains the three-letter numerical code followed by the - character and then the text.
第一线包含三字符的数字号码，其后跟-号，接着是文本。最后一线用空格代替减号。
Essentially, Soundex algorithms function by mapping each letter of a given alphabet to a numerical code representing its phonetic group.
从实际上说，soundex算法的运作方式是把某个字母表中的每个字母映射成代表它的语音组的一个数字代码。
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