tornado cloud的意思|示意

Tornado chasers there spent seven hours and 150 miles (240 kilometers) tracking the supercell thunderstorm that produced this cloud formation.

那里的龙卷风追风人历经七小时，行程240公里，追逐这个由超级单体雷暴形成的云体，拍下了精彩的图片。

The calm in the center of an incomplete tornado allows the cloud cover to remain in place, where at the edges of the swirl the cloud cover is torn away.

一个不完全的龙卷风中心的无风点使得覆盖云不挪动位置，呆在了原处，而旋转管道边缘处的覆盖云却被撕碎了。

In the background is the cloud (white), from which the tornado formed.

背景之中的云(白色)是龙卷风的风源。