double demy

例句：

1. 1. She doubles her efforts to improve her skills.
   她加倍努力提高自己的技能。
2. 2. The company doubled its profits last quarter.
   这家公司上个季度的利润翻了一番。
3. 3. He doubled his salary after winning the lottery.
   他中了彩票后工资翻倍了。