“两倍的”的英语可以翻译为：double，twofold ...

这些票以其面值两倍的价钱售出。Tickets were selling at twice their face value.我们付你两倍的薪水.We'll pay you double times.这样来看,年费相差两倍的两家基金之间就像是隔了一道鸿沟.That makes the threefold gap between their fees look like a canyon....