Perhaps the greatest strength in Rexx as a text processing language is its useful collection of built-in string manipulation functions.
或许，作为一门文本处理语言，Rexx的最强大之处在于它所具备的实用的内置字符串处理函数。
This tutorial provides a hands-on introduction to the AWK text-processing language.
本教程为 AWK 文本处理语言提供了实践性的介绍。
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