challengingly [ˈtʃælɪndʒɪŋ]

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附加级

挑战性的；引起兴趣的；令人深思的

a challenging and rewarding career as a teacher 富有挑战性且有意义的教师职业
She performed the most challenging task without a mistake. 她毫无差错地完成了这一最富有挑战性的任务。