| 单词 | blue lead |
| 释义 | Definition of blue lead in English:blue leadnoun ˌbluː ˈliːd US Mining historical
OriginMid 19th century; earliest use found in Mining Magazine. From blue + lead. Definition of blue lead in US English:blue leadnounˌbluː ˈliːd US Mining historical
OriginMid 19th century; earliest use found in Mining Magazine. From blue + lead. |
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