复合分组就是对被研究现象总体按两个或两个以上的标志结合起来所进行的分组。具体地说，它是先按一个标志分组,然后再按另一个标志将已分好的各个组又划分为若干小组。复合分组的排列形式既可以是层叠式又可以是交叉式。
既然已经有了区分组件类型的框架，我们就来讨论围绕复合应用程序开发的开发过程。
Now that you have a framework for classifying types of components, let's discuss the processes that a central group may organize around composite application development.
如果程序员不想考虑这些规则，可以在复合表达式中使用圆括号强制实现某个特殊的分组。
Programmers can override these rules by parenthesizing compound expressions to force a particular grouping.
设计了一种基于压力流量复合控制的盾构推进液压系统，对液压缸进行了分组控制。
A thrust hydraulic system of shield tunnelling machine with pressure and flow compound control was designed, and hydraulic cylinders were also controlled in groups.
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