翻开中美两国粮食价格走势图,我们就会发现,美国粮食价格波动非常频繁,波动幅度非常大,而我国粮食价格则相对平稳得多。美国小麦、玉米价格平稳年份的波幅都达到20%以上, If we open the food price chart between China and the United States, we will find that the fluctuations of the grain prices in the United States are very frequent and the fluctuations are very large. However, the grain prices in China are relatively stable. The volatility of the steady wheat prices in the United States reached over 20%