cirrostratus

名词 cirrostratus:

1. a thin uniform layer of hazy cloud at high altitude
   同义词：cirrostratus cloud

cir.ro.stra.tus

n.（名词）
A high-altitude, thin hazy cloud, usually covering the sky and often producing a halo effect.
卷层云：一种薄雾状高空云，常覆盖天空并产生光晕效应