positive ion emission

例句：

1. 1. The positiveion emission from the solar wind is a key factor in determining the planet's magnetic field.
   太阳风中的正离子发射是决定行星磁场的关键因素。
2. 2.The study of positive ion emission has led to significant advancements in space technology.
   正离子发射的研究已经使太空技术取得了重大进步。
3. 3. In the laboratory, scientists can observe the positive ion emission from a variety of materials.
   在实验室里，科学家们可以观察到各种材料产生的正离子发射现象。