ex cathedra
adjective [ before noun ], adverb formal uk/ˌeks kəˈθiː.drə/ us/ˌeks kəˈθiː.drə/
权威性的；来自权威方面的；（教皇谕旨）一贯判断正确的
with complete authority, or said by the Pope to be true and so accepted by all members of the Roman Catholic Church
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。