虽然可以用Web服务描述语言（WSDL）来定义简单的请求/响应交互，但我们不能使用功能有限的WSDL来表示实际的编排。
While Web Services Definination Language (WSDL) can be used to define simplistic Request/Response interactions, I cannot use WSDL with its limited capabilities to express realistic choreographies.
除了基本Web服务功能外，对Web服务编排和脚本语言的需求也已经出现，这给以大型机为中心的开发团队带来了更大的压力。
Beyond the basic Web Services capabilities requirements for orchestration or scripting languages have emerged putting yet more pressure on mainframe-centric development teams.
对于服务接口的实现包含其他服务的编排的情况，此服务应该使用BPEL语言作为业务流程实现。
In cases where the implementation of a service interface consists of an orchestration of other services, this service should be implemented as a business process using the BPEL language.
在服务编排层，组合服务是通过编排语言(例如业务流程执行语言(Business Process ExecutionLanguage,BPEL))定义的。
In the service choreography layer, composite services are defined by means of a choreography language, such as BPEL (Business Process Execution language).
在服务编排层，组合服务是通过编排语言(例如业务流程执行语言(Business Process ExecutionLanguage,BPEL))定义的。
In the service choreography layer, composite services are defined by means of a choreography language, such as BPEL (Business Process Execution language).
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