unprecedented的副词是：unprecedentedly。unprecedented的英英释义是Adjective:having no precedent; novel;"an unprecedented expansion in population and industry"。unprecedented【近义词】extraordinary非凡的。
一、词典解释点此查看unprecedented的详细内容
1.前所未有的；空前的；没有先例的
If something isunprecedented, it has never happened before.
unprecedented的意思
e.g. Such a move is rare, but notunprecedented...
这种做法很罕见，但也不是没有先例的。
e.g. In 1987 the Socialists took theunprecedented step of appointing a civilian to command the force.
1987年，社会党人史无前例地任命了一位非军队出身的人来指挥军队。
2.（质量、数量、规模）很高的，很大的
If you describe something asunprecedented, you are emphasizing that it is very great in quality, amount, or scale.
e.g. Each home boasts anunprecedented level of quality throughout...
每家的质量都堪称一流。
e.g. The scheme has been hailed as anunprecedented success.
这个计划广受好评，被认为是一个巨大的成功。
二、网络解释
1. unprecedented的反义词
1. 史无前例的：另外为了更好地了解用户对产品和服务的意见,还推出了定期的用户电话回访活动. 给用户提供唯一的(unique)、全年无休的(uninterrupted)、全国统一的(unified)、无与伦比的(unparalleled)、史无前例的(unprecedented)五优的无忧服务.
2. 前所未有：我经验了前所未有 (unprecedented) 的震撼感受. 昨晚第一场第一局就以11:2 输, 但是第二局时, 我处理了几球好球, 期间我还数度落后再领先(9:7)., 对於一些球, 我打回去的点跟质量, 似乎让他稍微动容, 但最后以9:11 输掉.
三、例句
We are seeing unemployment on an unprecedented scale.
我们现在正经历规模空前的失业现象。
His statement made an unprecedented splash.
他的声明引起了空前的轰动。
The air crash caused an unprecedented number of deaths.
这次空难的死亡人数是空前的。
Some economists showed their anxiety on unprecedented level of unemployment.
一些经济学家对失业率达到前所未有的程度表示忧虑。
Our school faced unprecedented difficulties.
我们学校碰到了前所未有的困难。
四、词汇搭配
五、经典引文
We are entering an age of abundance unprecedented in history.
出自：A. E. Stevensonunprecedented的相关近义词
extraordinary、exceptional、unduplicated、unique、amazing、signal、original、unparalleled、record、first-time、unmatched
unprecedented的相关反义词
unprecedented的相关临近词
unpredictable、unpopular、unprecedentedly、unprecedentedness、unprecedented move、unprecedented rise、unprecedented risk、unprecedented sales、Unprecedented story、unprecedented scale、unprecedented danger、unprecedented dilemma