1
- twice as great or as numerous两倍的：
a twofold increase in the risk.
风险增加两倍。
1.1
- having two parts or elements有两部分的; 双重的：
the twofold demands of the business and motherhood.
干事业和做母亲的双重需求。
- so as to double: to twice the number or amount两倍地; 双重地：
use increased more than twofold from 1979 to 1989.
1979-1989年间利用量增长超过两倍。