地震发生的时候云变得很恐怖。
留心地震云，虽然最近已被看到但目前还没有发生地震。
Watch for the earthquake clouds, although these have been seen recently and as yet there have been no quakes.
通过分析地震云来进行地震预报，也是地震预报的一种形式，但这种方式通常不被地震学家和其他科学家所接受。
The analyses of earthquake clouds as a form of earthquake prediction are generally not accepted by seismologists and other scientists.
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