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  • Passenger pigeons(旅鸽)once flew over much of the Unite 日期:2016-12-07 10:52:58 点击:105 好评:458

    Passenger pigeons(旅鸽)once flew over much of the United States in unbelievable numbers. Written accounts from the 18th and 19th centuries described flocks(群)so large that they darkened the sky for hours. It was calculated that...

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