The autumn fields, mature crops have been cut down, the earth filled with grain harvest.
秋天的原野上，成熟了的庄稼已被割倒，大地上堆满了丰收的五谷。
The drop's key period of time for yield are found by analyzed the drop's effect of increase and reduce for crops, it include summer grain crops, autumn crops and oil crops.
通过对夏粮、秋粮和油料作物降水的增减产效应分析，找出了降水对产量影响的关键时段。
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