coal mining
/ˈkəʊl ˌmʌɪnɪŋ/noun
The action, practice, or occupation of digging for coal.
Origin
Late 18th century; earliest use found in Bath Chronicles. From coal + mining.
| 单词 | coal mining |
| 释义 | coal mining/ˈkəʊl ˌmʌɪnɪŋ/noun The action, practice, or occupation of digging for coal. Origin |
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