通过程序转换把程序中的标志变量进行转换，改进渐进式测试的操作。
This method converts flag variables in programs through programmatic conversion, and the progressive testing is improved.
在一系列渐进式要求中，必须首先处理最简单的要求，然后才能在同一领域进行改进。
In an incremental series of requirements, the simplest requirements must be tackled before enhancements in the same area.
传统的四阶段模型在模拟精明增长方面有许多问题，应当进行全面的改进，但是必须循序渐进，逐步完善。
It is concluded that the four-step model should be considerably revamped due to many existing issues, and that the improvement process should be undertaken in an incremental and orderly way.
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