Good planning, solid documentation, and well-structured programs can help to minimize maintenance cost.
良好的计划、实用的文件资料和合适的程序结构都有助于减少维护费用。
The keys to maintenance are careful planning, good documentation, and good program design.
维护的关键是认真的计划，完整的文档资料和优良的程序设计 。
The keys to maintenance are careful planning, good documentation, and good program design.
维护的关键是认真的计划，完整的文档资料和优良的程序设计 。
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