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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When users scratch off the labels, they see a numerical code.

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Gmail service offers an option for users to access their email accounts using both a password, and a numerical code separately sent to the authorized user's mobile phone.

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Given the pager's limited message space, American teens have devised a special numerical code.

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