求翻译：近50年来宁夏的年平均气温上升了2.9℃，尤其中部干旱带升高了3.1℃；仅近10年平均气温升高2.1℃，达到了有历史记录来的最高阶段；是什么意思？

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For the past 50 years, the average temperature of the Ningxia C has risen by 2.9 degrees, in particular in central arid zone had risen only 3.1 degrees C; nearly 10 average temperature has risen 2.1 degrees C reached a historical record, the highest stage;

The near for 50 year Ningxia's annual mean temperature rose 2.9℃, middle the arid zone elevated especially 3.1℃; The nearly 10 annual mean temperature ascension 2.1℃, had only achieved has the historic record highest stage;

Annual mean temperature in Ningxia in recent 50 years rose by 2.9 ° c, especially the drought zone of middle warmed by 3.1 ° c; average temperature 2.1 c only the last 10 years, reached the highest stage of history;

Annual mean temperature in Ningxia in recent 50 years rose by 2.9 ° c, especially the drought zone of middle warmed by 3.1 ° c; average temperature 2.1 c only the last 10 years, reached the highest stage of history;