求翻译：（2） 在此基础上，根据已有的种植计划和灌溉经验，设计水稻、小麦和玉米的灌溉制度。再结合辽宁省的平均灌溉水利用效率，计算灌区各年的灌溉用水量；是什么意思？

(2) On this basis, the basis of the planting plan and irrigation experience, the design of rice, wheat and maize irrigation system. Of Liaoning Province, the average irrigation water use efficiency, the calculation of years of irrigation water of the irrigation area;

(2) * On this basis, on the basis of the cultivation and irrigation experience, plan design rice, wheat and corn of the irrigation system. Combined with the Liaoning provincial average irrigation water use efficiency, the calculation of terrain in the irrigation water use.

(2) In this foundation, according to already the planting plan which has and irrigates the experience, the design paddy rice, the wheat and corn's irrigation system.Recombination Liaoning Province's average irrigation water use efficiency, computation irrigation area each year irrigation water consu

(2) on this basis, based on the experience already planting schemes and irrigation, design of irrigation system for rice, wheat and maize. Combined with average irrigation water use efficiency in Liaoning province, calculate the amount of irrigation water irrigation area each year;

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