Yoursmileisasignofhowyou’refeeling,andwhoyouare.Peoplew...
问题详情：Yoursmileisasignofhowyou’refeeling,andwhoyouare.Peoplewithbrightersmilesandwhiteteethappearyouthful,healthy,opentoconversationandsureofthemselves.Asmilesendsgoodmessagesaboutyourselftoothers...