Duolingo Cost:Free Thislanguagelearningappofferscours...
问题详情:Duolingo Cost:Free ThislanguagelearningappofferscoursesinSpanish,French,Italian,GermanandPortuguese.Andit’snotallaboutreadingandwriting—itusesthephone’smicrophonetotestusers'pronunci...
问题详情:Duolingo Cost:Free ThislanguagelearningappofferscoursesinSpanish,French,Italian,GermanandPortuguese.Andit’snotallaboutreadingandwriting—itusesthephone’smicrophonetotestusers'pronunci...