positive beta particle

例句：

1. 1. The physicist detected a positive beta particle in the experiment.
   物理学家在实验中检测到了一个正β粒子。
2. 2. The scientists are trying to understand the behavior of positive beta particles.
   科学家们正在尝试理解正β粒子的行为。
3. 3. The positive beta particle is a crucial component in the process of radioactive decay.
   正β粒子是放射性衰变过程中的一个关键组成部分。