The current channel is set by the calling program or transaction by issuing a LINK, XCTL, START and pseudo-conversational RETURN with the channel parameter.

通过发出带有管道参数的LINK、XCTL、START和伪会话return，当前管道由调用程序或事务实现。

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As a result of the invocation of any link, the portlet may define a set of current render parameters.

作为任何链接调用的结果，Portlet可能会定义一个当前呈现参数集。

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Note that the render link contains the complete set of render parameters for the next request, not only the modification with respect to the current render parameters.

请注意，呈现链接包含下一个请求的呈现参数的全集，而不只是相对于当前呈现参数的修改。

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