proliferated

例句:

• Books and articles on the subject have proliferated over the last year.
  过去一年以来，论及这一问题的书和文章大量涌现。
  
• Influenza proliferated throughout the country.
  流感在全国蔓延.
  
• In recent years commercial, cultural, travel and other contacts have proliferated between Europe and China.
  近年来，欧洲和中国之间的商业、文化、旅游及其他交往发展迅猛。
  
• Second opinions proliferated, upping the costs.
  来自WSJ
• The region began to change as armed groups proliferated and competed.
  来自VOA
• Criminal gangs proliferated throughout the city.
  来自NEWYORKER