helpfulKK [ˋhɛlpfəl] /ˈhɛlpfəl/发音形容词1有帮助的、有用的、有益的Your comments on my draft were extremely helpful.你对我草稿的意见非常有帮助。2乐于助人的、热心的The staff at the front desk were friendly and helpful.柜台的人员既亲切又乐于助人。用这个字练口说→