英语翻译：我来自电子与信息工程系计算机与科学技术一班

I come from Class one of Computer Science & Technology Major of Electronics and Information Engineering Department
系：department，专业：major

I come from Class one of Computer Science & Technology Major of Electronics and Information Engineering Department

Have a try.I am in class one of Computer Science & Technology, Department of Electronics & Information Engineering.

电子与信息工程系计算机与科学技术
个人意见：Computer Science&technology Class One,School of Electronic&Information Engineering