对每个项目，开发历史连同基准对于保持参考体系结构不陈旧过时都是很关键的。
A development history, along with benchmarks, for each project is the key to keeping a reference architecture from becoming stale and obsolete.
虽然这个项目的观点有点过时了，但对于项目目标与一般的 MVC 模式仍然是一个很好的入门介绍。
Though this view of the project is now somewhat outdated, it still provides a good introduction to project goals and the MVC pattern in general.
与很快会变得过时且难以进行更新的比较正式的项目计划不同，电子表格非常易于使用和维护。
A spreadsheet is very easy to use and maintain, unlike the more formal project plan which quickly goes stale and is never easily updated.
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