As the official journal of the AGA Institute, gastroenterology delivers up-to-date and authoritative coverage of both basic and clinical gastroenterology.

作为阿加研究所的官方杂志，《肠胃病学》涵盖了基础和临床胃肠病学。

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Refining official page detection: We try hard to give our users the most relevant and authoritative results.

炼油官方网页检测：我们努力给我们的用户最相关和最权威的结果。

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By choosing "the Official Cambridge Guide to IELTS" candidates can be confident they have the most authoritative preparation available for this potentially life-changing exam.

选择《剑桥雅思官方指南》，考生便从容地拥有了雅思考试最权威的备考资料。

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The Obama administration has "made it clear that any real dialogue -- multilateral or bilateral -- needed to be authoritative, " according to the senior administration official.

CNN: Obama sent letter to Iran leader before election, sources say