Although these examples may work with earlier versions of Perl, Linux, and other operating systems, if they fail, their failure to function should be considered an exercise for the reader to solve.
虽然这些示例也许可以和较早版本的Perl、Linux及其它操作系统一起工作，但是如果它们不能一起工作，那么它们无法工作的原因可以作为练习，让读者去解决。
Although these examples may work with earlier versions of Perl, Linux, and other operating systems, if they fail, their failure to function should be considered an exercise for the reader to solve.
虽然这些示例也许可以和较早版本的Perl、Linux及其它操作系统一起工作，但是如果它们不能一起工作，那么它们无法工作的原因可以作为练习，让读者去解决。
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