简言之，看过所有那些关于PowerPC系统的市场宣传材料后，您知道了这种系统有着非比寻常的成本节约效果，而且易于修改，能够满足特定业务市场，而这就是一个具体的例子。

In short, after all that marketing material you've heard about PowerPC systems being unusually cost-effective and easy to modify to suit given business markets, here's a concrete example.

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这就是为什么很多银行的标识和宣传品都使用这种颜色的原因。

This is why many Banks use it in their logos or marketing.

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他说，讲道理不会改变行为，这就是为什么禁烟宣传一般没什么用处的原因。

Reason doesn't change behavior, which is why stop-smoking messages don't usually work, Dr. Kazdin says.

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看！这就是我穿的宣传服！

Look at me! At what I am wearing!

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这就是为什么我上电视宣传片子的起因。

That's the reason why you go on TV, is to promote movies.

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这就是为什么我上电视宣传片子的起因。

That's the reason why you go on TV, is to promote movies.

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