农民之所以穷，是因为只出售初级农产品，没有多大差价。
The reason farmers are poor is because they just sell primary agricultural products and there is little price difference for them.
农民之所以穷，是因为只出售初级农产品，没有多大差价。
The reason farmers are poor is because they just sell primary agricultural products and there is little price difference for them.
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