求翻译：加南京地区热源后的年平均降水变化与850hPa 风矢量场变化叠加，（中）加广州地区热源后的年平均降水变化与850hPa风矢量场变化叠加，（下）同时加广州和南京地区热源后的年平均降水变化与850hPa风矢量场变化叠加是什么意思？

The average annual precipitation changes plus Nanjing area heat source superimposed with the 850hpa wind vector field changes, the heat source (middle) Guangzhou area after the annual average precipitation changes and the 850hpa wind vector field changes superimposed, (bottom) plus heat sources in G

The Nanjing area after the heat source, with 850 average precipitation changes hPa wind vector field changes (in superposition, and the Guangzhou area) after the heat source, with 850 average precipitation changes hPa wind vector field changes, and (the stack) at the same time the Guangzhou and Nanj

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After adding heat sources in Nanjing 850hPa and annual average precipitation of the wind vector field in overlay, () after adding heat sources in Guangzhou 850hPa and annual average precipitation of the wind vector field in overlay, (ii) at the same time after the heat source in the Guangzhou and Na

After adds the Nanjing area heat source the annual mean precipitation change and the 850hPa wind vector field change superimposition, after (Part 2) adds the Guangzhou area heat source the annual mean precipitation change and the 850hPa wind vector field change superimposition, after (Part 3) simult