自然世界的知识(包括云)应该作为大众常识的一部分。云可以被视为有趣自然现象中一个简单的介绍。 因此这里列出了十种云,按云层的高度从高到低排列。然而,从下往上地学习这些词汇可能是最简单的方法。(由cumulus堆积云开始--一种蓬松的、在好天气才可以见到的云彩)
cirrus: thin wisps of ice-crystal cloud at high altitudes cirrostratus: a high-altitude, thin layer of ice-crystal cloud, formed from the spreading out of cirrus. Often shows some fibrous structure. 卷层云:高空、薄层的水晶云,由卷云的扩散形成。通常展示出了一些纤维结构。 cirrocumulus: a high-altitude layer of tiny heaps of ice-crystal cloud with no shading and clear gaps between the cloudlets. 卷积云:高空的小堆的冰晶云,云朵之间没有阴影和明显的缝隙。 altostratus: a middle-altitude layer of essentially featureless, white or grey cloud. altocumulus: a middle altitude layer of moderate-sized heaps of cloud, with distinct shading and clear gaps between the cloudlets. 高积云:中层云,中等程度堆状云,云朵之间有明显的阴影和缝隙。 nimbostratus: a dense layer of cloud at middle levels, often extending down close to the surface. Often with a ragged base, and always producing prolonged rain. 雨层云:密集的中层云,密度均匀。云底较乱,通常呈现不规则形,通常产生长时间的降雨。 stratocumulus: a widespread layer of heaps or rolls of cloud at a low level, with distinct gaps and heavy shading. 层积云:堆状或卷状的低层云,有明显的缝隙和较重的阴影。 stratus: an essentially featureless, grey layer of cloud at low level. At ground level, it is mist or fog. 层云:这种云本质上毫无特色,灰色的低层云。在地平面时,它是薄雾或浓雾状。 cumulus: the most familiar cloud. Rounded heaps of white cloud at low levels, generally an indication of currently fine weather. 积云:最常见的云。白色的圆堆状低层云,一般是好天气的预兆。 cumulonimbus: the giant among clouds, that may tower through all three levels, sometimes with a flattened top . The shower cloud with dark, ragged base and heavy, localized rain, hail, or other severe weather. 积雨云:云体庞大,呈塔状,云体有时可以跨越三个云层,顶部也可呈扁平状。这种阵雨云的底部阴暗不规则,常带来大型降雨,局部降雨,冰雹或者其他恶劣的天气状况。
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