quadrupole lens

例句：

1. 1. The quadrupole lens is used to focus light in a microscope.
   四极透镜用于显微镜中聚焦光线。
2. 2. The quadrupole lens is an important component of the particle accelerator.
   四极透镜是粒子加速器的一个重要组成部分。
3. 3. The quadrupole lens is used to correct for parallax errors in long-distance astronomical observations.
   四极透镜用于纠正远距离天文观测中的视差误差。