| 单词 | soft coal |
| 释义 | > as lemmassoft coal soft coal n. a kind of coal that is less hard than other kinds and easily split; spec. coal of a lower rank (rank n.1 10), such as brown coal and lignite; cf. hard coal n. ΚΠ 1693 J. Houghton in Coll. for Improvem. Husbandry & Trade No. 42 (single sheet) A vast difference may be perceiv'd; that of soft Coal giving a taste of the Mineral. 1789 J. Williams Nat. Hist. Mineral Kingdom I. 232 Sometimes you can judge pretty near the crop or surface whether it will be a hard or soft coal. 1855 J. Phillips Man. Geol. 190 ‘Soft’ coal, where the cleat fissures are numerous and broken by cross cleat. 1885 W. D. Howells Rise Silas Lapham xvi. 304 The soft-coal fire in the grate. 1926 J. Roberts Mining Educator I. 677/1 American cities where the use of ‘soft’ or smoky coal is forbidden by law. 1979 Sci. Amer. Jan. 28/3 Hard coal (anthracite and the various grades of bituminous coal) and soft coal (brown coal and lignite). 2009 New Yorker 20 July 36/1 Owing to cost considerations low-grade soft coal—so-called ‘dirty coal’—is currently providing more than ninety-three per cent of the energy for the fires of Hell. < as lemmas |
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