It is a naked electron and is a sodium positive ion.
它是个裸电子，是钠正离子。
The effects of the positive and negative ion background on the discharge path are studied.
用实验方法研究了正、负离子背景对放电路径的影响。
The positive charge of metal ion determines the strength of the acid.
而金属离子的电荷决定了酸的强弱。
The positive charge of metal ion determines the strength of the acid.
而金属离子的电荷决定了酸的强弱。
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