Green barrier can bring environment credit and make agricultural products of advanced countries have differential advantage.

绿色壁垒还能够带来环境信誉，环境信誉使发达国家的农产品形成差异化优势。

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The two tax credits in the CBO list--the EITC and the child tax credit--differ from the exclusions, deductions and differential rates in that they are available only to taxpayers with relatively low incomes.

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