1.  unprecedented
2.  beyond example

• 1. 史无前例的: unprecedented | as never before | than ever before | beyond example
• 2. 史无前例的规模: unprecedented scale
• 3. 史无前例的步骤: ground-breaking procedure | breaking procedure

更多释义

• 1.这一警报是由北极地区史无前例的事件所引发的。
  The alarm is caused by unprecedented events in the Arctic.
  dict.yoduao.com
• 2.巴基斯坦史无前例的洪水夺去了两千万人的生命，也影响了这个国家蜘蛛的数量。
  The unprecedented flooding in Pakistan disrupted the lives of 20 million people, but it also affected the country's arachnid population.
  dict.yoduao.com
• 3.纽约市的大型快餐连锁店已经开始遵守史无前例的规定，也就是在菜单上标明卡路里计数。
  Big fast-food chains in New York City have started to obey a first of its kind rule, requiring them to post calorie counts right on the menu.
  dict.yoduao.com

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