half value layer

例句：

1. 1. The half value layer is crucial for the stability of the liquid crystal display.
   半值层对于液晶显示器的稳定性至关重要。
2. 2. The scientist used a half value layer to filter out the light that interfered with the experiment.
   科学家使用半值层来过滤掉干扰实验的光。
3. 3. In order to improve the image quality, the camera uses a half value layer.
   为了提高图像质量，相机使用了半值层。