单词 | pion |
释义 | Word Frequency pion(ˈpaɪɒn) or pi meson noun physics a meson having a positive or negative charge and a rest mass 273.13 times that of the electron, or no charge and a rest mass 264.14 times that of the electron Word origin C20: from Greek letter pi1 + on |
随便看 |
英语词典包含233703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。