求翻译：食品价格和农产品价格高度相关，而中国农产品的周期波动又相当明显而剧烈。但年来猪肉价格的周期波动大家已经领教过了，现在的价格处于高位，而且会维持到春节，成为推动价格上涨的主要因素；最近又出现了土豆和绿豆价格的波动，价格处于低谷。去年绿豆价格大涨，一时成为社会关注的焦点，今年江西农产品市场的绿豆价格比去年下跌20%。去年土豆市场推销不错，今年却出现了难卖，在内蒙古呼和浩特。包头等生产区，土豆价格比去年下跌30%-50%。这种情况既不利于价格的稳定，预示着明年这些商品的涨价，更不利于农业生产的价格是什么意思？

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Food prices, and high prices of agricultural products and agricultural products in China related to the cycle fluctuations are fairly obvious and dramatic. But, the price of pork, we have already experienced the cycle fluctuations, the prices are higher now, and will remain, a Spring Festival to pro

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