thundercloud

n.

雷雨云；有威胁性或可怕的东西；

复数：thunderclouds

1. As a thundercloud moves through the air, a strong negative charge gathers near its base.
   当雷雨云在空气中移动时，一股很强的负电荷在云层底部附近聚集。
2. This finding suggests that massive runaway breakdown may have happened within the thundercloud in a process related to the initiation of the triggered lightning.
   这个发现说明，雷雨云内可能发生逃逸崩溃的过程，与人造闪电的发生有关。

'Thundercloud'.
Some thundercloud problems
Gigantic jets between a thundercloud and the ionosphere
The electric field of a thundercloud and some of its effects
Electrical discharge from a thundercloud top to the lower ionosphere
Blue jets produced by quasi‐electrostatic pre‐discharge thundercloud fields
A two-dimensional model of runaway electron beams driven by quasi-electrostatic thundercloud fields
A computational study of the relationships linking lightning frequency and other thundercloud parameters
Heating, ionization and upward discharges in the mesosphere, due to intense quasi-electrostatic thundercloud fields
γ-Ray emission produced by a relativistic beam of runaway electrons accelerated by quasi-electrostatic thundercloud fields