新华社哈瓦那9月16日消息，为期两天的“77国集团和中国”峰会16日在古巴首都哈瓦那闭幕。峰会通过《哈瓦那宣言》，呼吁全面改革国际金融结构，构建更包容、协调的全球经济治理格局。
I have been using WCF for a few years now and am fairly comfortable with it, however there is one simple WCF concept that I have yet to employ and am having difficulties with it.
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