[N-COUNT 可数名词]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
[N-SING 单数名词]火炉般的地方;极闷热的地方 If you say that a place is afurnace, you mean that it is very hot there.
[emphasis]
[INFORMAL 非正式]
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。
Oxford
fur·nace/ˈfɜːnɪs; NAmEˈfɜːrnɪs/noun1a space surrounded on all sides by walls and a roof for heating metal or glass to very high temperatures 熔炉◆It's like a furnace(= very hot)in here! 这里热得像火炉!☞see also