And when we asked experts, like the official at Medicare that we interviewed, they have no clue as to why there's such a wide variation.

当我们询问专家时，比如我们采访的 Medicare 官员，他们不知道为什么会有如此大的差异。

Many also displayed what photographers call high dynamic range, meaning a wide variation in light levels within the image, with pools of deep shadow and other areas brightly lit.

许多照片还展示了摄影师所说的高动态范围，这意味着图像中的光线水平变化很大，有深阴影池和其他区域明亮。