访问控制模块利用完整性锁结构实现元组级强制访问控制，利用SQL语句分析实现属性级强制访问控制。
The access control module of DSPS enforces tuple level MAC through Integrity lock and enforce attribute level MAC through SQL commands parsing and controlling.
耕地利用完成了耕地价值转换，将耕地投入价值与耕地产出价值比较，便产生了耕地利用效益问题。
The use of arable land to complete the conversion value of the land will be cultivated land into arable land and the output value, we have had effectiveness of the use of arable land.
耕地利用完成了耕地价值转换，将耕地投入价值与耕地产出价值比较，便产生了耕地利用效益问题。
The use of arable land to complete the conversion value of the land will be cultivated land into arable land and the output value, we have had effectiveness of the use of arable land.
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