twofold

twofold
adj, adv
1 twice as much or as many 两倍（的）; 双重（的）
    a twofold increase 增加至两倍
    Her original investment had increased twofold. 她原先的投资额已增至两倍.
2 consisting of two parts 由两部分组成的
    a twofold development plan 有两部分的发展计画.

牛津英汉双解词典