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“顺光、侧光、侧逆光,逆光四种;从投射光高度又分成,通常高度、顶光、脚光三种;从光度的性质分直射光和散射光二种。”
"Along the light, side light, side backlight, backlight four; from the projected light height is divided into, usually height, the top light, the foot light of three; from the nature of the light points of direct light and scattered light two.