让富人们为财政赤字埋单并非是”阶层斗争”，“数学问题。”

Tapping the rich to close the deficit is “not class warfare”, argues Mr Obama.

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当他在各领域—包括消费者行为、财政学、国际贸易、商业周期—辛勤耕耘时，总是遭遇到一些类似的、屈从于数学技巧的同一局限的问题。

As he laboured in each field-consumer behaviour, public finance, international trade, business cycles-he encountered similar problems, which yielded to the same set of mathematical techniques.

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然而，在一些贫困的农村地区，有极少数学校，很多坡乡孩子不能去上学，因为缺乏财政支持。

However, in some poverty-stricken rural areas, few school-agers can afford to go to school because of lack of financial support.

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然而，在一些贫困的农村地区，有极少数学校，很多坡乡孩子不能去上学，因为缺乏财政支持。

However, in some poverty-stricken rural areas, few school-agers can afford to go to school because of lack of financial support.

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