Increasing the yield per unit area on the existing cultivated land has potential. 提高現有耕地單位面積產量有潛力。
Of the addition that covers an area and domain extend, the synchronism that assures crop yield per unit and benefit further rises. 覆蓋面積的增加和領域的拓展，進一步保證作物單位面積產量和效益的同步提高。
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