| 单词 | blue metal |
| 释义 | > as lemmasblue metal blue metal n. (a) argillaceous shale or aggregate of a bluish colour, used esp. in road-making; (b) copper in the form of a matte (matte n.2), produced in smelting (now rare). ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > shale > others till1672 bass1686 bat1686 blue metal1699 scallop slate1711 black shale1730 shale-shiver1794 shale1825 till-stonec1830 Wenlock shale1834 famp1836 Boghead1858 oil shale1866 paper shale1874 symon1881 paste-rock1882 slasto1953 the world > the earth > structure of the earth > constituent materials > stone > stony material > [noun] > gravel or shingle > gravel > type of flood gravelc1420 river gravel1600 blue metal1699 slither1811 flint-gravel1865 plateau gravel1872 duck-gravel1885 peastone1909 pea gravel1911 society > occupation and work > materials > raw material > stone or rock > [noun] > for making roads > type of rubble1852 blue metal2000 1699 Philos. Trans. (Royal Soc.) 21 75/1 In Clay and blew Metal 4 yards. 1769 J. Wallis Nat. Hist. Northumberland I. vii. 130 The chief strata of earths and minerals observed in this mine, are blue metal; white post, 6 fathom; a slaty stone, 5 yards; [etc.]. 1823 Ann. Philos. New Ser. 5 119 In the granulated state, it [sc. smelted copper] is called fine metal; in the solid form, blue metal, from the colour of its surface. 1900–1 Trans. Inst. Mining Engineers 20 239 At some works, the coarse metal is not calcined, but roasted direct to blue metal. 1909 A. H. Davis On our Selection (1953) vi. 30 We had been accustomed to pelt her with potatoes and blue-metal. 2000 Ralph 7 July 31/2 The concrete-mix ratio for a path or driveway is two parts cement, four parts sand, one part water and eight parts aggregate—the blue metal, gravel or stones that turns cement into concrete. < as lemmas |
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