GRAININESS – the sand-like or granular appearance of an image.
颗粒状– 照片出现沙子状或颗粒状的表象。
2
I like walking on the wet sand when the tide is out.
我喜欢退潮后走在潮湿的沙滩上。
《牛津词典》
3
Sediment as you know, is material likesand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.