| 单词 | phosphate rock |
| 释义 | > as lemmasphosphate rock phosphate rock n. rock containing a substantial amount of calcium phosphate (usually in the form of apatite). ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > mineral or chemical composition > [noun] > rock containing specific mineral alum rockc1637 silver-spat1668 salt-rock1670 tin-spar1681 garnet-rock1794 mimophyre1824 crystalline1856 haüynophyr1865 minette1866 phosphate rock1869 1869 H. S. Osborn Metall. Iron & Steel 34 The irons in general proximity to these phosphate rocks are said to be..contaminated with phosphoric acid. 1915 W. S. Bayley Minerals & Rocks i. ii. 71 Phosphate rock is a mixture of apatite, phosphorite and various hydrated phosphates. 1989 Discover Oct. 28/3 They should put phosphate rock in the soil to build up the natural vigor in the grass. < as lemmas |
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