treated as singular The branch of physics that deals with the behaviour of electrons and electron beams in magnetic and electric fields.
treated as singular The branch of physics that deals with the behavior of electrons and electron beams in magnetic and electric fields.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。