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扶貧專家李勃：科技扶貧，讓綠水青山變成金山銀山「CC講壇31」(雙語字幕)

扶貧專家李勃：科技扶貧，讓綠水青山變成金山銀山「CC講壇31」(雙語字幕)Watch on YouTube

The summary is being prepared. You can watch the original video on YouTube.