| 释义 | 
		co·a·ra·tion \ˌkōəˈrāshən\ noun (-s) Etymology: co- + obsolete aration tilling of the soil, from Latin aration-, aratio, from aratus (past participle of arare to plow) + -ion-, -io -ion — more at ear  : cooperative tilling of the soil as practiced by early village communities |