multiple cropping system是什么意思 multiple cropping system怎么读
multiple cropping system的相关资料
multiple cropping system的用法和样例
- Under the precondition of high grain production, cropping index and light energy utilization should be put up continuously so as to make agriculture more profitable.
在粮食高产前提下，要不断提高复种指数和光能利用律，使农业更为盈利。
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