Being of the achromatic color of maximum darkness; having little or no hue owing to absorption of almost all incidentlight.
最黑的非彩色颜色;因为吸收了几乎所有的入射光而只有很少的颜色或者没有颜色。
2
Reflecting only a small fraction of incidentlight.
反射入射光的仅一小部分的。
3
The equations of caustic curve and its initial curve for a crack illuminated by an oblique incidentlight beam in reflection arrangement were deduced using the space analytic geometry method.