I obtained or created four base documents for purposes of comparison in this article.

本文中，我获取或创建了四个基本文档用于比较的目的。

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That kind of comparison should in theory eliminate the base effect of comparing growth with early 2009, though not all economists are convinced by the central bank's estimates.

这种比较在理论上消除了与2009年初经济增长相比产生的基数效应，尽管并非所有的经济学家都确信央行的数据估算。

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The GDP revision means China's year-to-year growth will have a higher comparison base for the second and following quarters, so the growth may be lower than economists' expectations.

GDP增幅的修订意味着二季度及接下来的几个季度，中国的同比增长将有一个更高的比较基础，因此增幅可能会低于经济学家的预期。

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Their forecast is 3.5% growth in 2013 for the Brazilian economy, given the low base of comparison, more benign international environment and the lagged effects of monetary and fiscal stimuli on investment growth.

FORBES: Worst Might Be Over For Brazil Economy

The data was converted to base 100 for comparison purposes.

FORBES: Why We Don't Buy Corporate Bond ETFs

Viacom will likely look to cash in on the expected success of upcoming Paramount Pictures films like Kung Fu Panda 2, and should benefit from a weak comparison base in 2010.

FORBES: Viacom Kicks Assets, Makes Money, Stock Goes To $52