名词
中文翻译：云层
同义词：
['cumulonimbus cloud', 'cumulonimbus layer例句：1. The sky was overcast with cirrostratus clouds.（天空被积云层覆盖。）']
例句：
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1. The sky was overcast with cirrostratus clouds.
天空被积云层覆盖。
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2. The storm passed quickly, leaving behind only a few cirrostratus clouds.
暴风雨迅速过去，只留下了几朵积云。
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3. Cirrostratus clouds are common in the mid-latitudes during the summer months.
积云层在中纬度的夏季很常见。