| 单词 | nitrate deposit | 
| 释义 | > as lemmasnitrate deposit   nitrate deposit  n. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > nitrogen > 			[noun]		 > compounds > deposits or beds nitre bed1788 nitriary1839 nitrate deposit1853 nitre-heap1867 1853    A. Ure Dict. Arts 		(ed. 4)	 273  				The nitrate deposits commence about Tilineche, and extend south. 1881    Daily News 22 Jan. 2/6  				The nitrate deposits, which are practically inexhaustible. 1952    A. M. Smith Manures & Fertilisers v. 106  				Sodium nitrate is produced by chemical synthesis, but the bulk of it is obtained from the crude nitrate deposits in Chile. < as lemmas | 
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