authoritativeKK [əˋθɔrəˏtetɪv] /əˈθɔɹəˌteɪtɪv/发音形容词1权威的、可靠的This book is still the most authoritative study of the subject.这本书至今仍是该主题最具权威的研究。2威严的、有威信的She spoke in a calm, authoritative voice and everyone listened.她以冷静而威严的声音说话,所有人都听了进去。3官方的、正式的We are waiting for an authoritative ruling from the committee.我们正在等委员会的正式裁决。用这个字练口说→