n.圆形物
The assemblies are a direct replacement for older style incandescent bulbs, fitting into the roundel ring as a replacement for the existing roundel, reflector and bracket. 这些组件可直接替换样式陈旧的白炽灯泡，适合于圆玻璃环，可替换现有圆玻璃、反射器和煤气灯。
n.反覆的小调；圆舞之一种；小鸟的鸣啭
