离子

例句：

1. 1. In a battery, positive and negative ions combine to produce electricity.
   在电池中，正离子和负离子结合产生电力。
2. 2. The scientist discovered that the ions in the solution were causing the reaction.
   科学家发现溶液中的离子引起了反应。
3. 3. The ionization process is crucial for understanding chemical reactions.
   离子化过程对于理解化学反应至关重要。