在这种复合类型中，进行交互的消费者和提供者被看作是对等的伙伴，互相交换数据和控制信号。

In this type of composition, the interacting consumer and provider are viewed as peers, exchanging data and control signals.

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白盒子是可互相交换的，主应用程序可能把集群中的任何机器指派为控制者，而这个机器就把map和reduce任务分派给其它连接的白盒子。

White boxes are interchangeable, and the main application may assign any machine in the cluster as the controller, and this one in turn assigns map or reduce tasks to other connected white boxes.

youdao

现在我们需要建造一个机器人控制器对象，稍大一点，以便它不会和地面相交。

Now we need to make the robot controller object a little larger so that he doesn't intersect with the ground.

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