fourfold [ˈfɔ:rfoʊld]

例句:

• By the late eighties their number had grown fourfold.
  到80年代末的时候，他们的数量已是原来的4倍。
  
• For a diagnosis of tularemia you need a fourfold increase in serum antibody levels.
  要诊断是兔热症,她的血清抗体等级需要有4个部分的增长.
  
• Electric hand is basic be electric head ache is fourfold.
  电手基本是电头疼痛的四倍.
  
• The number of prescriptions has risen fourfold.
  来自WSJ
• The tweet went viral, leading her to increase her Twitter followers fourfold and earn television coverage.
  来自WSJ
• Studies show that having dense breasts raises the risk of developing breast cancer fourfold to sixfold.
  来自WSJ