The highest flying clouds here are cirrus clouds which can be found at altitudes of 20,000 to 40,000 feet.

这里最高的飞行是卷，在2万到4万英尺的高度找到。

Slender sheaves of cirrus clouds were followed on the horizon by layers of nimbocumulus. Other low clouds fled swiftly.

天际边一层层散开的卷的后面，紧随团团乌，还有一些低飞快地掠过。

On any given day odds are you'll see several contrails, some slowly spreading out to form high, cirrus clouds.

每天我们都有机会看到航迹，有些会慢慢散开形成高空卷。

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下扩散成薄片状，被命名为卷层。由大量蓬松的积聚集扩散而成的，则命名为层积。

In fact, all clouds belong to one of three principle types to which Howard gave the names: cirrus, Latin for tendril or hair, cumulus, heap or pile, and stratus, layer or sheet.

实际上，所有的属于三种基本形式之一，霍德华给它们命名为：卷，来自于拉丁语中的卷须或头发，积，堆积或积累，层，层叠或片。

He looked at the sky and saw the white cumulus built like friendly piles of ice cream and high above were the thin feathers of the cirrus against the high September sky.

他望望天空，看见一团团白色的积，形状象一堆堆人心意的冰淇淋，而在高高的上空，高爽的九月的天空衬托着一团团羽毛般的卷。