First you have to define the event interface.

首先你得定义事件接口。

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The event channel deals with event hierarchies by determining the most specific subtype of the event interface subscribed by an event receiver.

事件通道通过确定事件接收者订阅的事件接口的最具体的子类型，来处理事件层次结构。

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The event interface is not needed.

事件接口不需要选择。

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Also creating buzz at the event was the unveiling of the iBook interface, an aspect of the iPad that's expected to take a big bite out of the e-reader market currently dominated by Amazon's Kindle.

CNN: Apple unveils the 'magical' iPad

In a presentation at the paidContent 2012 event on Wednesday, WP founder Matt Mullenweg described a new interface that will take the software in a new direction.

FORBES: WordPress @9: Matt Mullenweg on 'Radical Simplification' for Mobile and Social

Highlights of the week include an art installation at a sectarian interface in north Belfast and an Understanding the Past centenaries event looking back at the turbulent period leading up to the partition of Ireland.

BBC: Peace wall in Belfast