双倍性的

例句：

1. 1. We doubled the number of students in our class.
   我们增加了班级学生数量的两倍。
2. 2. The company's profits have doubled since the last year.
   这家公司的利润在过去一年翻了一番。
3. 3.The cost of living has doubled in this area over the past decade.
   过去十年里，这个地区的生活成本翻了一番。