a rare and little known kind of lightning having the form of a moving globe of light several centimetres across which persists for periods of up to a minute
球状闪电。
n. 球状闪电
This freaky phenomenon is ball lightning.
这种奇异的现象被称作球形闪电。
Ball lightning seems an obvious explanation, says Dr Hughes.
休斯博士说,球状闪电似乎是个明显的解释。
One strange form of lightning is called ball lightning.
球状闪电是一种奇怪的闪电类型。
This highlights a problem faced by people proposing theories of ball lightning .
这使得球状闪电理论的提出者所面临的一个问题凸显出来。
Ball lightning sometimes rolls along the ground until it crashes into a tree or high wall.
有时,球状闪电在地上滚动,发出巨大的声响,直到碰到树木或高墙为止。
球状闪电指的是在雷暴时发生,为圆球形状的闪电。 俗称滚地雷,这是一种真实的物理现象。它十分亮,近圆球形,直径约15至40厘米不等。通常仅维持数秒,但也有维持了1至2分钟的记录。颜色除常见的橙色和红色外,还有黄色、紫色、蓝色、亮白色、幽绿色的光环,呈多种多样的色彩。 球状闪电的危害较大,它可以随气流起伏在近地空中自在飘飞或逆风而行。它可以通过开着的门窗进入室内,常见的是穿过烟囱后进入建筑物。它甚至可以在导线上滑动,有时会悬停,有时会无声消失,有时又会因为碰到障碍物爆炸。 球状闪电是形成雷电的电动趋势,在半击穿空气时产生的空气离子球。它其中携带能量,包裹相对稳定。当有导体破坏它的平衡时,它会和周围的空气中和,并释放出能量。
a rare and little known kind of lightning having the form of a moving globe of light several centimetres across which persists for periods of up to a minute
球状闪电。