If there is a possibility that it will need to be read, either by other programs, or by your program on different hardware, you need to know about data portability.
如果数据可能需要被其他程序或其他硬件上的程序进行读取，那么您就需要了解有关数据可移植性的问题。
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Something that might have become apparent is that, for most well-behaved software, portability issues involve Makefiles, not actual program code.