authoritative [əˈθɔ:rəteɪtɪv]

例句:

• "Very well," I said, adopting a crisp authoritative tone.
  “很好，”我用干脆的命令性的语气说道。
  
• The first authoritative study of polio was published in 1840.
  关于小儿麻痹症的第一篇权威性研究报告发表于1840年。
  
• Neither has authoritative leaders or a formal hierarchical structure.
  来自NEWYORKER
• He has a commanding presence and deep, authoritative voice.
  他仪态威严，声音低沉，说话有威信。
  
• Mr Nolan said he'd thought the source was authoritative.
  来自THETIMES
• He was diligent and in acting authoritative.
  来自R. North
• David speaks in authoritative tones.
  大卫以命令的口吻说话。
  来自《权威词典》
• This piece of news came from an authoritative source.
  这条消息来自权威人士。
  来自《权威词典》