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电动牙刷真的有效果吗？
source link: https://www.v2ex.com/t/567043
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问与答 - @MOUNT - 现在微博上很多的博主都在推电动牙刷，哪哪都能看到，知乎上也是。有种现在不用电动牙刷，以后牙齿肯定问题多多的感觉。有点疑惑是不是真的有用，会不会只是一个像牛油果一样的营销产品。请买过电动
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