fourfold
adjective uk/ˈfɔː.fəʊld/ us/ˈfɔːr.foʊld/
四倍的
four times as big or as much
a fourfold increase 四倍的增加
由四部分组成的
having four parts
a fourfold division 分成四份
fourfold
adverb uk/ˈfɔː.fəʊld/ us/ˈfɔːr.foʊld/
（以）四倍（地）
by four times
Operating profits jumped nearly fourfold. 经营利润跳升了近四倍。