天然照明 natural lighting ; natural illumination
自然照明 natural lighting
太阳为何依然照耀 Why does the sun go on shining ; Why does the sun keep on shining
天然色照相术 heliochromy ; chromophotography
天然色照相 natural color photography
天然色照片 heliochrome
自然采光照玫数 natural illumination factor
照片当然有 Photos there are of course ; Of course there are pictures ; Photo course
自然光照 natural light ; NL
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