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云的种类很多，那么它们的英文名是什么呢？ Knowledge of the natural world (including clouds) should be part of everyone’s general understanding. Clouds should be viewed as an easy introduction to a vast range of fascinating phenomena. 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。 So here is a list of those ten clouds, arranged conventionally in three height levels with the highest first in the list. It is, however, easiest to learn them from the bottom up. (Start with cumulus, the ‘cotton-wool’ fluffy, ‘fair-weather’ clouds.) 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) Ten clouds 十种云朵~ altostratus: a middle-altitude layer of essentially featureless, white or grey cloud. 高层云：中层本质上毫无特色，是白色或灰色的云。 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. | 
