炉底

例句：

1. 1. The fireman was trying to put out the fire at the furnace bottom.
   消防员试图在炉子底部扑灭火焰。
2. 2. The old stove had a rusty furnace bottom that needed to be replaced.
   这台旧火炉有一个生锈的炉底，需要更换。
3. 3. The engineer inspected the furnace bottom before starting the new project.
   工程师在开始新项目之前检查了炉子底部。