阴云天气的增加；兰兰天空被一层白雾状气体蒙蒙；

Blue sky is often shadowed by a layer of white foggy air.

youdao

阴云天气的增加；兰兰天空被一层白雾状气体蒙蒙；

Blue sky is often shadowed by a layer of white foggy air.

youdao