During the client's service invocation, the UDDI registry is queried to obtain the access point (URL) of the service.

在客户端的服务调用期间，查询uddi注册中心来获得服务的访问点(url)。

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The portlet implementation needs to make sure that there is proper backend access and cache update handling if the cache does not return the data when queried with a certain key.

Portlet实现需要确保如果使用特定键查询时，缓存没有返回数据，应有适当的后端访问和缓存进行更新处理。

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Each of these methods accepts a transformation context object that can be queried to gain access to the source and target objects.

这三个方法都接受转换环境对象，可以查询它们来访问源和目标对象。

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