n. a quantity that is four times as great as another
v. increase fourfold
s. having four units or components
s. four times as great or many
a. 四倍的, 四重的, 四部分组成的
n. 四倍
vt. 使成四倍
vi. 成为四倍
1. The company plans to quadruple its production next year.
该公司计划在明年将生产量增加四倍。
2. If we work hard, we can quadruple our sales by the end of the year.
如果我们努力工作，到年底我们可以将销售额增加四倍。
3. The population of the city is expected to quadruple in the next decade.
预计这个城市的人口在下一个十年将增加四倍。