concave reflector

例句：

1. 1. Theconcave reflector is designed tofocus light onto a specific area.
   这个凹面反射器被设计用来将光线聚焦到特定区域。
2. 2. The convex reflector is used in photography to bounce lightoff objects and onto the camera lens.
   凸面反射器在摄影中被用来让光线从物体上反弹到相机镜头上。
3. 3. The concave reflectorwas made from a piece of glass thathad been shaped into a curved surface.
   这个凹面反射器是由一块被制成弯曲表面的玻璃制成的。