一旦字符串处理函数失败，就把目标缓冲区设成NULL。

You want to set the target buffer to NULL on failure.

youdao

正如您在这个应用程序中所看到的那样，文件处理函数和字符串处理函数的设计考虑到了易用性。

As you can see from this application, the file-handling and string-handling functions were designed with ease-of-use in mind.

youdao

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。

Perhaps the greatest strength in Rexx as a text processing language is its useful collection of built-in string manipulation functions.

youdao