quadrupole aperture

例句：

1. 1.The quadrupole aperture in the magnet is crucial for its operation.
   磁铁中的四极孔对于其工作至关重要。
2. 2.The quadrupole aperture was designed to improve the resolution of the imaging system.
   四极孔的设计是为了提高成像系统的分辨率。
3. 3.The quadrupole aperture is responsible for focusing the magnetic field onto the desired area.
   四极孔负责将磁场聚焦到期望的区域。