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undoubtedly词根
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...
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