单词	proficiency
释义	pro·fi·cien·cy (prə-fĭshən-sē) n. pl. pro·fi·cien·cies The state or quality of being proficient; competence.
随便看	master sergeant mastership mastersinger Masterson masterstroke masterwork mastery masthead mastic masticate mastication masticator masticatory mastic tree mastiff mastiff bat mastigophoran mastitic mastitis masto- mastodon mastodonic mastodont mastoid mastoid bone

英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。