This captures the pixels after the composition engine has had its say.
之后，撰写引擎进行的说，这就会撷取像素。
Web service composition can be divided into two classes, narndy centralized architecture and decentralized architecture, by the location of the Web services composition engine.
组合服务按照其引擎分布可分为：集中式服务组合和分布式服务组合。
A composition often manages the state of its services, similar to what a BPEL engine would do for its composed services.
组合常常对其服务的状态进行管理，与BPEL引擎处理其所组合的服务的方式相似。
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