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综述了聚醚及其改性物和酯类化合物作为冷冻机基础油的生物降解性，添加剂对生物降解性的影响，以及各种评价生物降解性的试验方法。
The biodegradability of polyether and its modified compounds and esters as freezer base oils, the effects of additives on biodegradability, and various test methods for evaluating biodegradability were reviewed.