furnace air

例句：

1. 1. The furnace is designed to burn coal efficiently.
   这个炉子设计用来高效燃烧煤炭。
2. 2.The furnace air was contaminated with harmful chemicals.
   炉膛空气被有害化学物质污染了。
3. 3. The workers were exposed to high levels of furnace air during the construction process.
   在施工过程中，工人们暴露在高浓度的炉膛空气中。