ion sound wave

例句：

1. 1. The ionization of the gas is due to the presence of a strong electric field.
   气体的电离是由于存在强电场。
2. 2. Ionization can occur in various environments, such as in the atmosphere or underwater.
   离子化可以在各种环境中发生，如大气或水下。
3. 3. The ionization process involves the separation of atoms into positive and negative ions.
   离子化过程涉及将原子分离成正负离子。