| 单词 | blue earth |
| 释义 | Definition of blue earth in English:blue earthnoun Mining
OriginLate 19th century; earliest use found in The Academy: a monthly record of literature, learning, science, and art. Definition of blue earth in US English:blue earthnoun Mining
OriginLate 19th century; earliest use found in The Academy: a monthly record of literature, learning, science, and art. |
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