Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfea...
问题详情：Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfear:Aninventorisonthecase.Anelectrictoothbrushsenseshowlongandhowwellyoubrush,anditletsyoutrackyourperformanceonyourphone.TheKolibreetoothb...