在调用解密命令之前，清单13中的字符串操作函数将替换丢失的格式。

The string manipulation functions in Listing 13 replace the lost formatting before the decryption command is called.

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表2列出了用来从perl脚本中调用系统命令的Perl核心函数和操作符。

Table 2 lists Perl core functions and operators leveraged to call system commands from within a Perl script.

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