undoubtedly的精选

词根是doubt，怀疑的意思。doubt-doubted受到怀疑的-doubtedly有怀疑地-undoubtedly毫无疑问。如，Undoubtedly，thepollutionprobleminthisareaisbecomingincreasinglyserious.在英语中，很多动词都有这种变化，如expect期待-e...