cat's eyes
noun [ plural ] UK uk/ˈkæts aɪz/ us/ˈkæts aɪz/ (US reflectors)
（设置于公路中央或路侧在黑暗中引导车辆的）猫眼反光标记，猫眼反光镜
small pieces of glass or plastic that are put along the middle and sometimes the sides of a road, to reflect the lights of a car, in order to show the driver where to drive when it is dark