CoeWiktionary 原文中文来自 ECDICTabbr.卓越中心（Center of Excellence）；报名确认（Confirmation of enrollment）；计算机优化均衡（Computer Optimized Equalization）；公共操作环境（Common Operating Environment）演变路径（由近及远）英语源自 ←中古英语 co源自 ←古英语 ca “jackdaw”词源说明English surname, from Middle English co and Old English ca (“jackdaw”), similar to caw, Scots ka.释义（英文）专有名词 Proper noun(countable) A surname.A placename词族派生词（1）Strathcona