[ 'aiәn ] 柯林斯星级 ★☆☆☆☆ BNC词频 6303 COCA词频 10273 n. 离子 [化] 离子 n. a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons 复数: ions 英汉双解字典由 ECDICT 提供