built-in radiator

例句：

1. 1. The new car has a built-in radiator that keeps the engine cool during long drives.
   这款新车内置了散热器，即使在长途驾驶中也能保持发动机冷却。
2. 2. The old house had a built-in radiator that was no longer working properly.
   这所旧房子的内置散热器已经无法正常工作了。
3. 3. The engineer replaced the broken radiator with a new one to ensure the car's performance remained optimal.
   工程师用一个新的来替换坏了的散热器，以确保汽车的性能保持最优。