plane-parallel layer

例句：

1. 1.The thin film is a crucial component in the device's operation.
   这个薄膜是设备运行的关键组件。
2. 2. The scientist used a microscope to observe the structure of the plane-parallel layer.
   科学家使用显微镜观察了平面平行层的结构。
3. 3. The researcher found that the plane-parallel layer had a significant impact on the device's performance.
   研究人员发现，平面平行层对设备的性能有显著影响。