trough reflector

例句：

1. 1.The engineer used a trough reflector to adjust the focus of his camera.
   工程师使用了一个沟槽反射器来调整他的相机的焦点。
2. 2. The scientist placed a trough reflector in front of the telescope to increase its magnification.
   科学家在望远镜前放置了一个沟槽反射器以增加其放大率。
3. 3. The driver used a trough reflector to see the road better during night driving.
   司机使用了一个沟槽反射器在夜间驾驶时更好地看到道路。