bottom-up fashion

基本解释

In contrast to the validation phase, the measurement phase must happen in bottom-up fashion.
与验证阶段相反，度量阶段是自下而上的。
This step-by-step integration of components takes place in a bottom-up fashion, according to the order stipulated in the integration build plan.
这种一步步的组件集成发生在自下至上的方式中，并且按照集成构建计划规定的顺序进行。
Because I've explored the object in a bottom-up fashion so far in this article, I now look at the reverse from the user perspective (see Figure 7).
到目前为止，我都是以一种自下而上的方式探索对象，现在我们采用自上而下方式，从用户透视图中考察对象（见图 7）。