Design of a freeze concentration system must take into account the natural freezing-point depression observed in many foods.
设计冷冻浓缩系统时，我们必须考虑到许多食品的自然冰点下降。
Design of a freeze concentration system must take into account the natural freezing-point depression observed in many foods.
设计冷冻浓缩系统时，我们必须考虑到许多食品的自然冰点下降。
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