| 单词 | alum stone |
| 释义 | Definition of alum stone in English:alum stonenoun historical
OriginMid 17th century; earliest use found in Samuel Hartlib (d.?1670). Definition of alum stone in US English:alum stonenoun historical
OriginMid 17th century; earliest use found in Samuel Hartlib (d. ?1670). |
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