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TOEFL BNC: 20370 COCA: 17163

[ C or U ] a substance used to prevent decay in wood(木材的)防腐剂,保护剂

a timber/wood preservative木材防护剂
The fence has been treated with preservative.围栏经过了防腐处理。

[ C ] a chemical used to stop food from decaying(食品)防腐剂,保鲜剂

This bread is completely free from artificial preservatives.这种面包绝不含人工防腐剂。
No added preservatives.未添加任何防腐剂。
natural preservatives天然防腐剂

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