| 单词 | coal formation |
| 释义 | > as lemmascoal formation coal formation n. ΚΠ 1804 T. Thomson Syst. Chem. (ed. 2) IV. 141 Coal is found in two different formations. The first of these is distinguished particularly by the name of coal formation, or mountains of coal. 1935 M. C. Stopes in Fuel in Sci. & Pract. 14 11/1 A forest tree which crashed into a watery swamp and there partly decomposed and was macerated in the process of coal formation. 2008 Press (Christchurch, N.Z.) (Nexis) 16 Sept. 3 L&M's first well drilled into the coal formation had resulted in the desired showing of gas. < as lemmas |
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