不过创建一个高效航网公司，同时保证服务质量和辖域覆盖面，这对任何渴望回报的买家来说，都是一个苛求。

But creating a highly efficient network carrier while guaranteeing the quantity of services and territorial coverage sounds a much taller order for any buyer wanting a return on its money.

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另一方面，portlet 实体是限定作用域的。

On the other hand, the portlet entity is scoped.

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本文根据两相邻面域之间属性的变化程度探讨了地理边界的适宜性，并给出了属性不确定性度量指标。

The paper analyzes the appropriateness of geographical boundaries based on the change of attributes between their neighborhood polygons, and gives metric indicator of attribute uncertainties.

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