attenuated total reflectance

例句：

1. 1. The attenuated signal was barely detectable.
   衰减的信号几乎无法察觉。
2. 2.The attenuated sound waves were picked up by the microphone.
   衰减的声音波被麦克风捕捉到。
3. 3. The attenuated light from the sun is not visible to the naked eye.
   太阳发出的衰减光线肉眼不可见。