1A belt of charged particles, trapped by the magnetosphere, which orbits the earth or other planet.
2Chemistry a circulation of electrons in an annular molecular orbital (e.g. in aromatic molecules) under the influence of a magnetic field.
Mid 19th century.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。