【eng】黄河三角洲每年有600万只鸟类繁殖 越冬和迁徙 被称为鸟类的国际机场！《美丽中国自然》 黄河之水系列【cctv纪录】
Synopsis
本期内容：黄河从青海出发，自西向东流经九个省，在山东东营奔腾入海。远道而来的河水携带着大量的泥沙，每年从陆地向海洋 ...
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