双速版|ES051613

每天一起念念，提高听力，美化发音。  文本信息请关注公众号：esenglish 输入：晨读  示范：ES41623 = 2016年4月23日晨读中文版本请关注订阅号：espostsIf this is your first time noticing our functional friends, you're not alone! In common usage the word function refers to the purpose for which something is designed. On the keyboard, however, the function keys can accomplish anything from summoning help (F1) to accessing hidden recovery gateways (F11).