以下为句子列表：
英文: There are some obstacles ad difficulties in the process of transformating grain production superiority into regional systhetial economic superiority in main grain production area of our country, such as policy encouragement, contradictory of person and la
中文: 摘要我国粮食主产区产粮优势在向区域综合经济优势转变的过程中存在一定的障碍和困难，如政策激励、人地矛盾、农业弱质性、结构调整滞后性、优势转化平台等方面。
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