If you have a newer refrigerator clean the condenser coils yearly to reduce dust and dirt.
如果你家的冰箱是新买不久的，那么就每年定时清理冷凝盘管里的灰尘和污垢。
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The evaporator and the condenser are both copper coils, and there is some copper in the compressor, too.
蒸发器和冷凝器都是铜线圈，压缩机里也有一些铜。
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