coion

例句：

1. 1. The coion is a small particle that carries an electric charge.
   离子是携带电荷的小粒子。
2. 2. Coions are used in various applications such as electrochemistry and electrophysics.
   离子在各种应用中被使用，如电化学和电物理。
3. 3.The coion plays a crucial role in the formation of ionic bonds in chemical reactions.
   离子在化学反应中形成离子键中起着关键作用。