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July 21, 2018鲸和海豚游泳为何上下摆尾?1 minutePlay大部分海洋动物游泳都是左右摇摆,鲸和海豚却是另类。这到底是什么原因?让演化论来告诉你。...moreShareView all episodesBy DW.COM | Deutsche WelleJuly 21, 2018鲸和海豚游泳为何上下摆尾?1 minutePlay大部分海洋动物游泳都是左右摇摆,鲸和海豚却是另类。这到底是什么原因?让演化论来告诉你。...more