成两倍 doubly
两倍之多 twice as much as ; twice as many ;
的两倍 Twice ; The two times
两倍的贵 Twice as expensive
例句：
新驾驶员所出的'事故是老驾驶员的两倍。
New drivers have twice as many accidents as experienced drivers.
在过去的两年里，食物中毒事件增加了两倍。
Cases of food poisoning have trebled in the last two years.
In this profession, women outnumber men by two to one.