BPEL4WS是一种基于XML的流程组合语言，用于定义若干称为合作伙伴的服务的组合，以实现特定的业务需求。
BPEL4WS is an XML-based process-composition language used to define the composition of several services, called partners, to achieve specific business needs.
作为可执行流程的实现语言，BPEL4WS的作用是将一组现有的服务整合起来，从而定义一个新的Web服务。
As an executable process implementation language, the role of BPEL4WS is to define a new web service by composing a set of existing services.
BPEL是基于XML的工作流定义语言，业务可以使用它来描述所用的复杂的业务流程并提供Web服务。
BPEL is an XML-based workflow definition language with which businesses can describe sophisticated business processes that use and provide Web services.
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