radiator

冬天来了，我们需要打开暖气片取暖。

In winter, we turn on the ___radiator to keep warm.

冬天我们需要打开暖气片来保持房间温暖。

In winter, we need to turn on the ___radiator to keep the room warm.

我的车散热器出了问题，导致引擎温度过高。

There's something wrong with my car's ___radiator, making the engine overheat.