In the figure, the light check in shadow is surrounded by darker checks. Thus, even though the check is physically dark, it is light when compared to its neighbors.

本图中，处于阴影中的亮色块被暗色块包围，这样，即使它本身的颜色是暗的，它也应该比它周围的色块亮。

youdao

In the figure, the light check in shadow is surrounded by darker checks. Thus, even though the check is physically dark, it is light when compared to its neighbors.

本图中，处于阴影中的亮色块被暗色块包围，这样，即使它本身的颜色是暗的，它也应该比它周围的色块亮。

youdao