Which of these cloud types is typically found at the highest altitude?

这些云类型中哪个通常是在最高海拔处被发现的？

Who knew we'd still  be discovering new cloud types?

谁知道我们仍然会发现新的云类型？

So, there you have it, a primer on one of the  newest and least understood cloud types on record.

现在，您已经了解了有史以来最新且最不为人所知的云类型之一的入门知识。

There are five primary cloud types: stratus, cumulus, stratocumulus, cumulonimbus  and cirrus, each of which are subdivided into different genera based on altitude.

有五种主要的云类型：层云、积云、层积云、积雨云和卷云，每种云都根据海拔高度细分为不同的属。

So, in addition to the three main cloud types, he introduced a series of intermediate and compound types as a way of including the regular transitions that occur among clouds.

所以，除了三种主要的形状的命名，他还给一系列由三种形状衍生或合成的云命名，这样便能概括常见的云的变形。

According to the authors, asperitas clouds are  defined by their rough, somewhat wavelike cloud base, that lacks the smooth undulating shape of  the (possibly related) undulatus cloud type.

根据作者的说法，阿斯佩里塔斯云是由其粗糙的、有点波状的云底来定义的，它缺乏（可能相关的）波状云类型的光滑起伏形状。

These aren't smooth and wavelike, like the undulatus cloud type we just looked at, but have  a formation that is chaotic, like the stormy ocean we talked about earlier.

这些云并不像我们刚刚看到的波状云那样光滑且呈波浪状，而是具有混乱的形态，就像我们之前讨论过的波涛汹涌的海洋。

It may sound  crazy, but that image is a pretty close approximation of asperitas clouds, an extremely  rare cloud type that was only recognized by the World Meteorological Organization in 2017.

这听起来可能很疯狂， 但该图像非常接近阿斯佩里塔斯云，这是一种极其罕见的云类型， 直到 2017 年才被世界气象组织认可。

Howard identified seven cloud types, but these have since been expanded to ten, cloud nine being the towering cumulonimbus thunder cloud, which is probably why being on cloud nine means to be on top of the world.

霍华德一共命名了七种云，现在人们已将其扩展为十种。第九种云是高耸的积雨云，这或许是为什么“在第九种云上”有登上世界之巅的意思。