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佛罗里达州坦帕海湾的海牛近年来都过得很舒适,它们依靠发电厂排放出来的温水度过严寒的冬天。但是现在,发电厂因为污染严重将被关闭,这也意味着这些海牛将面临被冻死的危机。它们的命运将何去何从?能顺利地渡过下一个冬天吗?