v.(使)变为四倍
quadruple的过去分词和过去式

原形：quadruple第三人称单数：quadruples过去式：quadrupled过去分词：quadrupled现在分词：quadrupling

The company's profits quadrupled within five years.
公司的利润在五年内翻了四倍。
The population of the city has quadrupled since the construction of the new airport.
自从新建机场以来，这个城市的人口已经增长了四倍。
The athlete managed to quadruple his personal best in the long jump.
这位运动员在跳远比赛中将自己的个人最好成绩提高了四倍。
The cost of living has quadrupled over the past decade.
过去十年里，生活成本翻了四倍。
The internet speed in our area was quadrupled after the fiber optic upgrade.
在光纤升级后，我们地区的网络速度提高了四倍。
The number of visitors to the museum quadrupled after the renovation.
博物馆经过翻新后，参观人数增加了三倍。
She quadrupled her investment in just two years.
她仅用两年时间就使她的投资增值了四倍。
The productivity of the factory was quadrupled with the introduction of new technology.
引入新技术后，工厂的生产效率提高了四倍。
His income quadrupled when he started his own business.
他开始自己创业后，收入翻了四倍。
The size of the garden was quadrupled by adding a new section.
通过增加一个新的区域，花园的面积扩大了四倍。