In_word_set: This routine USES hash to determine whether a particular string belongs to the user-supplied list, using one string comparison in the most common case.

in _ word_set：该例程使用hash确定某个字符串是否属于用户提供的列表，大多数情况下只使用一个字符串比较。

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You can change the name of this routine using the -n option. The arguments to the routine are similar to the previously explained hash function.

您可以使用- n选项改变这个例程的名称。

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