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

这里最高的飞行云是卷云，可以在2万到4万英尺的高度找到。

2.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云的后面，紧乌云，还有一些低云飞快地掠过。

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

每天我们都有到航迹云，有些慢慢散开形成高空卷云。

4.AACPs are the wispy, cirrus clouds that form near the overshooting tops.

AACP是在超冲顶部附近形成的纤细卷云。机翻

5.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。

6.His tail floats now behind him, now above him, level or gracefully curled like a wisp of cirrus cloud, every hair in its place, clean and shining and radiant as thistle-down in spite of rough, gummy work.

像一缕卷云一样水平或优雅地卷曲， 每一根毛发都各就各位， 干净、闪亮， 尽管经过了粗糙、粘稠的工作， 但仍像蓟绒一样闪闪发光。机翻