?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Xu&rft.aufirst=Anqi&rft.au=Xu%2C+Anqi&rft.issn=0167-6393&rft.title=Speech+Communication&rft.atitle=Learnability+of+English+diphthongs%3A+One+dynamic+target+vs.+two+static+targets&rft.volume=170&rft.date=May+2025&rft.genre=article