四重的

例句：

1. 1.The teacher quadrupled the homework assignments for the final exam.
   老师为期末考试将作业量增加了四倍。
2. 2. The company quadrupled its profits last quarter.
   该公司上个季度的利润翻了一番。
3. 3.The scientist quadrupled the amount of water they used in their experiments.
   科学家将他们实验中使用的水量增加了四倍。