1·A spokesman for the Met Office said: 'Storms of this intensity only occur with large towering cumulonimbus clouds.'
气象部门的发言人说，“只有在大面积的积雨云汇聚的时候，这么强大的暴风雨才会出现。”
2·Sticking with the elephant unit, Heymsfield estimated that a typical thunderstorm cloud — a cumulonimbus — has 15 million elephants worth of water floating in the air at any given time.
继续以大象作为单位，赫穆斯·菲尔德估计一片标准的雷雨云——一片积雨云——在任何特定时间内，都相当于与1,500万头大象相同重量的水漂浮在天空中。
3·Cumulonimbus, along with cumulus, are the most dramatic types of cloud.
积雨云和积云是云中最神奇的类型。
4·A cumulonimbus cloud rises high into the sky and usually produces storms.
积雨云上升到空中，通常会带来暴风雨。
5·When approached the cumulonimbus , we could see by eyes there was a space of about 20km between the two major clouds.
当接近积雨云时，我们目视看见两个主体云间有20 公里的间隙，但是没想到穿越时遭遇强风和冰雹袭击。