Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfea...
問題詳情：Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfear:Aninventorisonthecase.Anelectrictoothbrushsenseshowlongandhowwellyoubrush,anditletsyoutrackyourperformanceonyourphone.TheKolibreetoothb...