In the end, I bought a Philips electric toothbrush. When I used it for the first time, I felt that my concussion was about to be shaken out hhhhh. After using the whitening mode for a month, it still has some effect, but it cannot be judged as a toothbrush or the like. After all, it's just a toothbrush~
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最终还是剁手买了飞利浦电动牙刷，第一次用的时候感觉脑震荡都快被震出来了hhhhh，美白模式用了一个月还是有点效果哒，但是不能当作美牙仪之类的来评判，毕竟是只牙刷而已～
