It is similar in the case of a distant hill. A distant hill looks bright, i. E. White, but less distinct because there are more air molecules and particles in between.

• 遥远山丘的例子也是一样,位处较远的山丘看起来光亮,即较白,但却不清楚,是因为眼睛与山丘之间有较多空气分子和微粒。