地震、火山爆发或闪电 earthquake volcanic eruption or lightning
有推论说，由于火山尘埃带电物质相互撞击而诱发火山闪电。
One theory is that it is caused by charge-inducing collisions in volcanic dust.
上个月，瑞知先生利用其丰富的火山拍摄经验，在日本樱岛火山拍摄到了神奇的火山闪电。
Mr Rietze used his vast pool of experience to capture a dramatic shot of volcanic lightning at Sakurajima volcano in Japan last month.
就像雷预示着闪电的出现一样，地震通常会预示着火山的爆发。
Just as thunder precedes lightning, earthquakes often foretell volcanic activity.
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