A central portion cut out and removed; esp. the cylindrical mass of rock extracted in the process of boring. Also, a portion extracted from the…
| 单词 | θ7623 | 
| 释义 | the world > the earth > earth sciences > geology > 			[noun]		 > sample from sea or lake bed (1)		 core1938 A central portion cut out and removed; esp. the cylindrical mass of rock extracted in the process of boring. Also, a portion extracted from the… | 
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