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1. The refrigeration oil in the refrigerator is essential for keeping the food fresh.
冰箱里的制冷油对于保持食物新鲜至关重要。
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2. The refrigeration oil was used to cool down the air before it was released into the atmosphere.
这种制冷油被用来在释放到大气之前冷却空气。
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3. The refrigeration oil was carefully mixed with the other chemicals to ensure a smooth operation of the machine.
这种制冷油与其他化学品小心混合，以确保机器的顺畅运行。