英汉词典

1. 火炉;熔炉
    A furnace is a container or enclosed space in which a very hot fire is made, for example to melt metal, burn rubbish, or produce steam.

2. 火炉般的地方;极闷热的地方
    If you say that a place is a furnace, you mean that it is very hot there.

    e.g. How can we walk? It's a furnace out there.
           我们怎么能走路呢？外面跟火炉似的。