The first clouds are thin, wispy cirrus, followed by sheets of cirrus and cirrostratus and altostratus.
最开始的云石薄而缥缈的卷云，紧接着是成片的卷层云和高层云。
They are referred to as "alto" clouds and bear such names as altostratus, which are flat, or altocumulus (pictured), which are puffy.
它们被称作“阿尔图”(中音部——译注)云，包括平坦的高层云和肥胖的高积云(上图)。
Patchy, highly textured cumulus clouds are present at lower altitudes, while grey altostratus clouds are stretched out by prevailing winds at higher altitudes.
片状、高质感的积云出现在低海拔的位置，而在高海拔，灰色的高层云被盛行的风所吹散。
Patchy, highly textured cumulus clouds are present at lower altitudes, while grey altostratus clouds are stretched out by prevailing winds at higher altitudes.
片状、高质感的积云出现在低海拔的位置，而在高海拔，灰色的高层云被盛行的风所吹散。
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