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它溢过火山口的边沿，形成200英尺宽的一道沉重的熔岩流，缓缓地流动着穿过谷底，任何不能从它经过的地方逃离的东西必死无疑。
It came over the edge in a heavy stream, 200 feet wide, and travelled slowly across the valley, bringing certain death to everything that could not move from its path.
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