怎样保证游泳不出意外?这些科技设备也许可以救命_智能_好奇心日报(QDaily)

七月的一个炎热的下午,我朋友八岁的儿子 Cody 差点在后院的游泳池里淹死。有两位母亲在旁边看着,当时水里除了他只有另外一个孩子。他很安静,那些看着他游泳的人以为他只是想看看自己能在水里憋气憋多久。当她们意

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