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蜜芽传媒 Media English “媒体英语”：Orcas seen 'massaging' each other with kelp 研究人员观察到虎鲸用海带为彼此 “按摩”
Scientists have observed orcas massaging each other with seaweed. Find out why they think this could be important
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蜜芽传媒 English in a Minute “一分钟英语”：四个包含单词 “fire” 的短语
Duration: 01:02
