preionization

例句：

1. 1. The process of preionization is crucial for the operation of the device.
   预离子化过程对于该设备的运行至关重要。
2. 2.During the preionization phase, the sample is exposed to a high-energy beam.
   在预离子化阶段，样品暴露于高能束流下。
3. 3.Preionization has been shown to improve the efficiency of energy conversion in some applications.
   研究表明，预离子化可以提高某些应用中的能量转换效率。