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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	slipped disk slipper slippered slipper flower slipperiness slippery slippery elm slippery slope slippily slippy slip ring slip sheet slip-sheet slipshod slipshoddiness slipstitch slipstream slip-up slipware slipway slit slither slithery slitter slit trench

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。