electric plume 验电羽
But the electric volcanic ash was found in the middle of the thick plume, not on its edges.
然而带电火山灰是在厚重的火山羽流中间被发现的，而不是在边缘。
Electric charges are fairly easy to observe with existing instruments, so a charged plume should be easier to track, even after the visible plume has largely dispersed.
使用现存的仪器就可以很简单的探测到电荷，因此一股携带电荷的火山灰流很容易进行追踪，即使火山灰流在可见范围内已经大面积扩散。
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