| 单词 | four-field course | 
| 释义 | > as lemmasfour-field course   four-field course  n. Agriculture a series of crops grown in four fields in rotation. ΘΚΠ the world > food and drink > farming > cultivation or tillage > cultivation of plants or crops > 			[noun]		 > rotation of crops rotation1757 course1767 succession1779 turnip-system1805 convertible husbandry1811 four-field course1842 1842    Ld. Tennyson Audley Court in  Poems 		(new ed.)	 II. 43  				We..discuss'd the farm, The fourfield system, and the price of grain. 1844    Jrnl. Royal Agric. Soc. 5  i. 162  				It is usually cropped on the four-field or Norfolk course. < as lemmas | 
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