The euro zone's public finances have improved dramatically, from a combined structural deficit of 2.1% of GDP before the 2001 recession to a deficit of only 0.7% of GDP in 2007.

欧元区公共财政状况也大为好转，复合结构性赤字由2001年衰退前的占GDP2.1%下降到0.7%。

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In order to deal with the problem of combined structural topology optimization, a basic algorithm idea is proposed.

为了解决带预应力的组合结构拓扑优化问题，提出了组合结构优化算法的基本思想。

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In order to deal with the problem of combined structural topology optimization, a basic algorithm idea is proposed.

为了解决带预应力的组合结构拓扑优化问题，提出了组合结构优化算法的基本思想。

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