elevenfold       
 adjective uk/ɪˈlev.ən.fəʊld/ us/əˈlev.ən.foʊld/
 11倍的
eleven times as big or as much
  an elevenfold increase in sales 销售额11倍的增长 
 elevenfold       
adverb uk/ɪˈlev.ən.fəʊld/ us/əˈlev.ən.foʊld/
 (以)十一倍(地)
by eleven times
  The use of these devices rose elevenfold in the 1990s. 九十年代,这些设备的使用数量增长了11倍。