单词	file extension
释义	file extensionˈfile exˌtension noun [countable] the letters, for example .doc, at the end of the name of a computer file that show what type of file it is
随便看	persuasively persuasiveness pert pertain Perth Perth and Kinross pertinacious pertinaciously pertinacity pertinence pertinent pertinently pertly pertness perturb perturbation perturbed Peru perusal peruse Peruvian perv pervade pervasive pervasiveness

英语词典包含52748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。