求翻译：自改革开放以来，南宁市的经济持续、快速、健康发展，产品结构日趋合理，经济质量不断提高，国内生产总值以年均10%以上的速度递增是什么意思？

Since the reform and opening up, Nanning City, sustained, rapid and healthy development, the product structure is becoming more reasonable, constantly improve the quality of the economy, gross domestic product of more than 10% average annual rate of

Since the start of reform and opening up, Nanning city, the sustained, rapid and healthy economic development, product structure, is becoming more rational economic quality of life have continued to improve, the gross domestic product (GDP) at an annual rate of more than 10 per cent

Since reform and open policy, Nanning's economy continually, fast, healthy development, the product mix is day by day reasonable, the economical quality enhances unceasingly, GDP by yearly average 10% above speed increasing

Since reform and opening up, the sustained, rapid, and healthy economic development in Nanning city, increasingly reasonable product structure, quality of the economy continues to improve, increasing at an annual rate of 10% per cent of the gross domestic

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