furnace

高温熔炉里的金属正在被倾倒。

The metal is being poured from a ___furnace.

冬天来临时，我们打开了暖气。

We turned on the ___furnace when winter arrived.

夏天的汽车内部就像一个火炉，热得让人难以忍受。

The inside of a car in summer feels like a ___furnace, unbearably hot.