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	eminence grise eminent eminent domain eminently Emin, Tracey emir emirate emissary emission emission credit emissions trading emit emitter Emmenthal Emmerdale Emmy emo emoji emollient emolument e-money emote emoticon emotion emotional

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