关键驱动之一是发行商认识到采用按展示付费的广告（CPM）时，在他们直接销售和通过广告网络商销售存货之间存在着巨大的差异。

One of the key drivers is the huge disparities in CPMs that publishers realise when they sell directly and when remnant inventory is sold via ad networks.

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他们通过电能驱动而不是冒烟的小型汽油引擎。

And instead of being powered by smoky little petrol engines, they are driven electrically.

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并且他们通过示例清晰地说明，小型开发项目可以同时运用RUP驱动和敏捷开发。

And they show quite clearly, through their example, that small development projects can be both RUP-driven and agile at the same time.

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