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Early in February,the nearly-500-foot-high San Rafael Waterfall in Ecuador—the largest in the South American nation—appears to have disappeared.But why?rnThe
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Early in February,the nearly-500-foot-high San Rafael Waterfall in Ecuador—the largest in the South American nation—appears to have disappeared.But why?rnThe iconic fall is found along the route of the Coca River at the intersection(交汇处)of the Andes Mountains and the Amazon Basin.
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