As we walk through these examples, notice that ROI is an equation with two variables.

当我们讨论这三个例子的时候，请注意roi是一个拥有两个可变因素的等式。

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Work through these examples carefully and then try to do the composition exercises in the same way.

仔细研究以下例题，然后用同样的方式完成作文练习。

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Through these examples we can move from the most elementary problems in economics to the most complex and difficult.

我们会利用经济生活中的实例，从经济学中最基本的问题讲起，一直讲到最复杂最艰深的问题。

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Of course, these patterns are rarely exactly the same, but through these examples, you should be well-prepared for most future scenarios.

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There are many, many more examples of these "Limbaughisms" through the years.

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These are just examples, but whether you book through a travel agent, an airline, or online chances are if you are headed to Spain or Greece you are going to find better deals than any time in the recent past.

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