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俞岱岩知此盐有剧毒，便想去看看他们究竟要害谁。岱岩跳进后院，见一房中有三个老者正在拉风箱，那石头炉火焰猛烈，炉中架着一柄四尺长、乌沉沉的刀。他想，这莫非就是那屠龙刀。
Yu Daiyan knew that this salt was highly toxic, so he wanted to see who they were trying to harm. Dai Yan jumped into the backyard and saw three elderly people in a room pulling wind boxes. The stone stove was ablaze with flames, and there was a four foot long, dark knife in it. He thought, “Is this the dragon slaying knife?”.
