prices fluctuating within a certain range

例句：

1. 1. The prices of these products have increased significantly in the past year.
   这些产品的价格在过去一年内显著上涨。
2. 2.The company's pricing strategy is based on market research.
   该公司的定价策略是基于市场研究。
3. 3. The price of oil has been steadily increasing since the beginning of the year.
   自年初以来，油价一直在稳步上涨。