6000 meters, forming icy cirrostratus layers.

6000 米的水平层云，形成冰冷的卷层层。

The beauty of Howard's system was that the basic components could be freely recombined to describe every shape and size of passing cloud--stratocumulus, cirrostratus, cumulocongestus, and so on.

霍华德体系的妙处在于，这些基本成分可以自由组合，描述天空中飘过的每种形状、每种大小的云——一层积云、卷层云、积雨云等等。

A high, whispy cirrus cloud that descended and spread into a sheet was named cirrostratus, while groups of fluffy cumulus clouds that joined up and spread were named stratocumulus.

原本在高空中的纤薄的层云下降并且扩散成薄片状，被命名为卷层云。由大量蓬松的积云聚集并扩散而成的，则命名为层积云。