辅助主光 supplementary main beam
主辅光
Main and auxiliary lighting
以上为机器翻译结果，长、整句建议使用 人工翻译 。
主要光源称为主光。主光常常用辅光作补充。室外拍摄的主光为阳光。
The main source of illumination is called the key light. The key light is frequently supplemented by subsidiary lighting. The chief source of light for outdoor shooting is sunlight.
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