bak
（网上聊天时的用语）重新回到键盘旁（back at the keyboard的缩写）
written abbreviation for back at the keyboard: used when you return to a discussion in an internet chat room after you have left it for a short time
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。