a substance used to preserve foodstuffs, wood, or other materials against decay
防腐剂;保护剂。
acting to preserve something
保护的,保存的
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the preservative effects of freezing .冷冻的防腐保护作用。
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preservativen.防腐剂;保护剂
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preservationn.保护;保养;维护;保全;保存;保留;留存
"late Middle English: via Old French from medieval Latin