twofold

形容词 twofold:

1. having more than one decidedly dissimilar aspects or qualities-Frederick Harrison
   同义词：double, dual, two-fold, treble, threefold, three-fold
2. twice as great or many
   同义词：double, doubled, two-fold

副词 twofold:

1. by a factor of two
   同义词：two times

1. Something increased twofold.
   倍增成倍增加的东西
2. Serving two purposes; twofold.
   为双重目的服务的; 双重的
3. Characterized by or consisting of two parts or components; twofold.
   双重的以两部分或要素为特色的或由之组成的; 两倍的