acid-free
adjective
Not containing any acid; (of paper) having neutral or slightly alkaline pH and thus being more resistant to deterioration.
Origin
Late 19th century; earliest use found in The Botanical Gazette.
| 单词 | acid-free |
| 释义 | acid-freeadjective Not containing any acid; (of paper) having neutral or slightly alkaline pH and thus being more resistant to deterioration. Origin |
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