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| 21. | isdiscribed, which is to determine object colour by use of the photovoltage ratio between two special colour light |
| 论述一种物体颜色的快速光电识别新方法，即利用透射谱或反射谱中二特殊色光的光电压比值来确定物体颜色类别。 |
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| 22. | band of colored light around a light source, as around the sun or moon, caused by the refraction and reflection |
| 晕环绕着诸如太阳或月亮等发光体的一圈有色光晕，通常是由于散布在大气层中的冰物质使光线发生反射或折射而引起的 |
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