Horizontal causality occurs when the event publisher resides on the same layer in an architecture's virtual layers as the event receiver.

当事件发布者与事件接收者位于架构虚拟层中的同一层时，发生水平因果关系。

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To take an extreme example, imagine that an electron does not scatter in an iron layer unless its spin points in the same direction as the layer's magnetization.

举一个极端的例子，假设一个电子没有在一个铁层散射，除非与层的磁化方向相同地旋转。

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You add the roads layer to the map using the same method as in Listing 4, substituting the layers and map options with appropriate values.

您还可以使用与清单4内相同的方法向地图添加道路层，只不过需要用适当的值代替layers和map选项。

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Needless to say, they decided to scrap that plan and build the puzzle mechanics of Portal 2 with the same basic mechanic as the original and layer new mechanics on top.

FORBES: Portal 2 Originally Didn't Have Portals

At the same time, all markets can't be different, there is a need to have a common layer so that you can use the same services such as stock tickers and e-mail notification in every device.

CNN: Will Java and Jini be in everything?

The biggest disappointed was the same as HD-DVD, which was the inability to demo the interactive layer.

ENGADGET: Blu-Ray Demo impressions HD