ninetyfold       
 adjective uk/ˈnaɪn.ti.fəʊld/ us/ˈnaɪn.t̬i.foʊld/
 九十倍的
ninety times as big or as much
  a ninetyfold increase 九十倍的增长 
 ninetyfold       
adverb uk/ˈnaɪn.ti.fəʊld/ us/ˈnaɪn.t̬ifoʊld/
 以九十倍(地)
by ninety times
  Their chance of contracting lung cancer is increased ninetyfold. 他们得肺癌的机会上升了九十倍。