double duo mill

例句：

1. 1.The price of the product doubled afterthe promotion.
   产品在促销后价格翻倍。
2. 2.We need to double our efforts to achieveour goals.
   我们需要加倍努力来实现我们的目标。
3. 3.The company doubled its profits last quarter.
   该公司上个季度的利润翻了一番。