4周搞定2000+托福核心词
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常考释义
This increase of food supply was due perhaps half to the increase of cultivated area, particularly by migration and settlement in the central and western provinces, and half to greater productivity - the farmers’ success in raising more crops per unit of land.
粮食供应的增加可能一半是由于耕地面积的增加，特别移民并定居到中西部省份带来的耕地面积增加；另一半是由于生产力的提高——农民成功提高了每单位土地面积的粮食产量。
来源于：阅读OFFICIAL48 P1n. 单位
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