政府目标是在25年内使高等教育学生人数翻倍。
The government aims to ___double the number of students in higher education within 25 years.
自引进新技术以来,公司利润已翻了一番。
Company profits have ___doubled since the introduction of new technology.
税收已经翻倍,而且汽油价格在过去3个月内上涨了50%以上。
Taxes have ___doubled, and the price for petrol shows an increase of more than 50% within the last 3 months.