零售业数字就属于这种类型的数据，因为消费性经济大约占据了美国经济活动的三分之二。

Retail sales numbers fall into this category as consumer spending accounts for approximately two-thirds of all U. S. economic activities.

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同时，由于经济成份的单一，经济活动单纯，税收种类很少，因此纳税人进行税收筹划的空间很小。

Meanwhile, the economic component part, the economic activity and the categories of tax are very simple.

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