able to be trusted as being accurate or true; reliable 可信的;可靠的 clear, authoritative information and advice. 明确可靠的信息和建议。 an authoritative source. 可信任的来源。 ■(of a text) considered to be the best of its kind and unlikely to be improved upon (文本)权威性的;完美的 this is likely to become the authoritative study of the subject. 这可能成为关于这个题目的权威性研究。
commanding and self-confident; likely to be respected and obeyed 有权威架子的;令人敬服的 she had an authoritative air. 她有一种居高临下的神态。 his voice was calm and authoritative. 他的声音冷静而威严。 ■proceeding from an official source and requiring compliance or obedience 官方的 authoritative directives. 官方指示。