twice as great or as numerous 两倍的 a twofold increase in the risk. 风险增加两倍。 ■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压力。
adverb
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年间利用率增长超过两倍。