unprecedented [ʌnˈprɛsɪˌdɛntɪd]

例句:

• The ceremony was disrupted by unprecedented heckling and slogan-chanting.
  仪式因前所未有的起哄和喊口号声而中断。
  来自柯林斯例句
• 'Unprecedented' The strike is a really sensitive subject.
  来自BBC
• Each home boasts an unprecedented level of quality throughout.
  每家的质量都堪称一流。
  
• The scheme has been hailed as an unprecedented success.
  这个计划广受好评，被认为是一个巨大的成功。
  
• The accident has led to an unprecedented public outcry.
  来自BBC
• "It was unprecedented," Dr. Landreth recalled.
  来自WSJ