noun [物质名词] 离子
It is a naked electron and is a sodium positive ion. 它是个裸电子，是钠正离子。
noun [专属名词] (Ion) （罗马尼亚、美）扬（人名）
We talked about this reaction here, where we had chloride ion in the gas phase plus sodium ion in the gas phase. 我们在讨论这一个反应，气态的氯原子加上气态的钠原子。
