完善对问题逐步深入的理解。
项目组合管理规程的采用是逐步深入的方法。
It is pervasive to the adoption of the portfolio management discipline.
逐步深入模式涉及到获得有关您已经找到的条目的详细信息。
The drill down pattern involves obtaining detailed information about an entity that you already have found.
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