办公室的暖气系统坏了，我们得找人修理。

The ___heating system in our office is broken and we need to get it fixed.

冬天我们通常使用暖气来保持房间温暖。

In winter, we usually use ___heating to keep the rooms warm.

你能把暖气关小一点吗？这里太热了。

Can you turn the ___heating down? It's too hot in here.