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词汇 altostratus
释义 altostratus
noun[ U ]
 environment specializeduk /ˌæl.təʊˈstrɑː.təs/ us /ˌæl.toʊˈstreɪ.t̬əs/
a type of stratus (= a flat, grey cloud) formed in thin layers and found at medium height, above the level of stratus层云(灰白成层的云雾,见于中等高度)
Compare
cirrostratus
nimbostratus
 
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SMART Vocabulary: related words and phrases

Precipitation: clouds, dew, fog & steam
billow
brume
chemtrail
cirrus
cloudily
cloudlessly
haze
haze over
lowering
misty
moisture
nimbus
overcast
pall
Scotch mist
steam (something) up
steamily
sub-visible
vapour trail
vog

Examples of altostratus


altostratus
Often, when an altostratus cloud thickens and descends into lower altitudes, it will become nimbostratus.
From
Wikipedia

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This cloud typically forms from altostratus in the middle altitude range, but it tends to thicken into the low altitude range during precipitation.
From
Wikipedia

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The variety "undulatus" (having a wavy undulating base) can occur with any clouds of the species stratiformis or lenticularis, and with altostratus.
From
Wikipedia

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Altostratus and nimbostratus clouds always have this physical appearance without significant variation or deviation and, therefore, do not need to be subdivided into species.
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Wikipedia

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They also can occur under altostratus cloud preceding a warm or occluded front, when cumulus usually lose vertical development as the sun's heat decreases.
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Wikipedia

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The altostratus velum cloud appears dark in comparison to its parent cloud, and can persist even after the cumulonimbus has disintegrated.
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Wikipedia

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A further thickening of the altostratus is often accompanied by virga and the arrival of precipitation is imminent.
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However, only two are seen with altostratus and stratus nebulosus whose uniform structures prevent the formation of a perlucidus variety.
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Wikipedia

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The best-known is cumulonimbus with mammatus, but the mamma feature is also seen occasionally with cirrus, cirrocumulus, altocumulus, altostratus, and stratocumulus.
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Wikipedia

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Altostratus is usually composed of water droplets but may be mixed with ice crystals at higher altitudes.
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Wikipedia

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These include middle-tage layers of "altocumulus" and "altostratus" as well as low "stratocumulus", and "stratus".
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Wikipedia

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If the precipitation increases in persistence and intensity, the altostratus cloud may thicken into nimbostratus.
From
Wikipedia

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The sun can be seen through thin altostratus, but thicker layers can be quite opaque.
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Wikipedia

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Fractonimbus exist only under precipitation clouds (such as nimbostratus, altostratus or cumulonimbus), and don't produce precipitation themselves.
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High altostratus clouds and night flying conditions prevented him from making any visual contact.
From
Wikipedia

This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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