| 单词 | slate-coal |
| 释义 | > as lemmasslate-coal slate-coal n. ΚΠ 1805 R. Jameson Syst. Mineral. II. 72 Slate-Coal... Colour intermediate between velvet-black and dark greyish-black. 1883 W. S. Gresley Gloss. Terms Coal Mining 225 Slate Coal, a hard, dull variety of coal, not unlike Cannel. < as lemmas |
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