rolling avalanche
滚动雪崩
以上为机器翻译结果，长、整句建议使用 人工翻译 。
An eruption at Indonesia's mount Merapi sent an avalanche of debris and ash rolling down the mountain slopes.
印尼马拉皮山脉的爆发，导致了山崩，大量的泥石沿着山坡滚落下来。
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Plus the man who was once caught in an avalanche and now studies the maths of how they move by rolling ping-pong balls down a ski slope.
BBC: Quantifying economic success
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