名词短语
中文翻译：内部火箱
同义词：
['inside furnace', 'inside boiler', 'inside heater例句：1. The engineer inspected the inside firebox before starting the engine.（工程师在启动发动机前检查了内部火箱。）']
例句：
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1. The engineer inspected the inside firebox before starting the engine.
工程师在启动发动机前检查了内部火箱。
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2.He found a small hole in the inside firebox and filled it with sand.
他在内部火箱里发现了一个小洞，并用沙子填上了。
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3. The inside firebox was filled with hot coals, ready for the next shift.
内部火箱被热煤填满，准备迎接下一班的工人。