subdouble

例句：

1. 1. The company's profits have subdoubled since the new policy was implemented.
   自从实施了新政策，公司的盈利已经增加了一倍。
2. 2. The teacher asked us to subdouble our efforts in order to improve our grades.
   老师要求我们加倍努力以便提高成绩。
3. 3. After the rain, the river's water level subdoubled.
   雨后，河水水位增加了一倍。