若夫日出而林霏开，云归而岩穴暝，晦明变化者，山间之朝暮也。

As if mists open after sun rising, caves close after clouds returning, the changer from brightness to dimness tells dawn and nightfall of mountains.

“现在正是暮色时分。”爱德华喃喃低语着，看着西边的地平线，那里被云层覆盖着，晦明不定。

"It's twilight," Edward murmured, looking at the western horizon, obscured as it was with clouds.

唐岱在《绘事发微》中说道：“山有四时之色，风雨晦明，变更不一，非着色以像其貌。”

Tangdai in the "micro-painted the incident," said: "the mountains are 4 color, wind and rain Huiming, change varies as to its non-colored old."