此次峰会的官方主题是社会团结，但是许多地区的高级领导人利用这次会议进行了双边能源会谈。
The official theme of the summit was social cohesion, but many of the region's top leaders took advantage of the event to hold bilateral meetings on energy.
此次会议的主题是“21世纪的电力转换和传输”。
The theme of the meeting is "Conversion and Delivery of Electrical Energy in 21st Century".
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