贝壳剖面的标本素描

A conch is cut open longitudinally, and the inner spiral cavity, thin shell, and outer texture are all discernible in the same scientific illustration; beige paper, graphite, and a small amount of light blue watercolor, no fictional organs or text labels.

一枚海螺被纵向剖开，螺旋内腔、薄壳层和外表纹路都在同一科学插画里可辨；米色纸张、石墨与少量淡蓝水彩，无虚构器官或文字标注。