这使得公司能够描述它们的服务，也使得客户能够按标准方法消费服务，而不必对有关较低级别的交换协议(绑定)，如SOAP，了解很多。

This enables companies to describe their services and enables the client to consume the services in a standard way without knowing much on the lower level exchange protocol (binding) like SOAP.

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挑战在于，在不同的服务领域中进行协商和沟通，以生成协议和标准来描述各个领域特定的 Web 服务。

The challenge lies in the negotiation and communication among different service domains to generate agreements and standards to describe domain-specific Web services.

youdao

Web服务是以使用SOAP消息(它是用像HTTP这样的标准协议上的WSDL来描述的)的调用为基础的。

Web services are based on invocation using SOAP messages which are described using WSDL over a standard protocol such as HTTP.

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