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It generates vast amounts of hydroelectricity, equivalent of more than half a dozen nuclear power stations. It's longer than 25 football pitches and higher than a 40-story building. Since the 1950s, the Chinese have built more than 22,000 large dams,
发表于:2019-01-22 / 阅读(40) / 评论(0)
自然百科2015年
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Among Zambia's cultural treasures is rock art dating back 12,000 years. But authorities are failing to protect it from vandalism, theft, illegal rock quarrying, and even graffiti. One local artist, though, inspired by the artform, is doing what he ca
发表于:2019-03-12 / 阅读(128) / 评论(0)
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