Adjective:

1. having no precedent; novel;

   "an unprecedented expansion in population and industry"
   

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。

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.

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。

The situation is unprecedented in modern times.

这种情况在现代还没有出现过。

a period of unprecedentedly high food prices

食物空前昂贵的时期

Such a move is rare, but not unprecedented...

这种做法很罕见，但也不是没有先例的。

In 1987 the Socialists took the unprecedented 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。

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 second characteristic is people's abroad study consciousness unprecedented enhancement.

第二个特点是国人的留学意识空前提高.

This will be a long war, and unprecedented challenges await us.

这将是一场旷日持久的战争, 史无前例的挑战等待着我们.

The level of world cooperation and condemnation of Iraq is unprecedented.

全世界合作的程度和谴责伊拉克的程度是史无前例的.

It is thirdly, international capital flow attains unprecedented scale.

其三是, 国际资本流动达到空前规模.

China's industry is developing at an unprecedented rate.

中国工业正以空前的速度发展.

These data show that China's auto parts industry is still in an unprecedented development opportunity.

这些数据都显示,在中国汽车零部件产业正处在前所未有的发展机遇下.

From now on, China will have welcomed the unprecedented abroad study flood tide.

自此, 中国迎来了史无前例的留学大潮.

With the advent of the information age, education is also showing unprecedented development trend.

随着信息时代的到来, 教育也呈现出前所未有的发展态势.

This achievement was unprecedented in automobile history.

这种成就在汽车业中是史无前例的.

By 1920 Russia presented the unprecedented spectacle of a modern civilization in complete collapse.

到1920年,俄国呈现出现代文明彻底失败的空前景象.

In recent years, multimedia and network communication technology makes hot images, the unprecedented active voice compression.

近年来, 多媒体与网络通信技术热使得图像 、 语音压缩空前活跃.

We are under the way of an unprecedented experiment of Chinese characteristic modernization.

我们正在进行一次史无前例的具有中国特色的社会主义现代化宏伟实验.

Their enthusiasm for production is rising to unprecedented heights.

他们的生产积极性空前高涨.

Experts say the scope and complexity of the Olympic projects are unprecedented.

专家指出,北京奥运工程的规模和复杂程度都是史无前例的.

The air crash caused an unprecedented number of deaths.

这次空难的死亡人数是空前的.

Transport developed on an unprecedented scale, and a comprehensive modern transport system began to take shape.

交通建设空前发展, 现代综合运输体系初步形成.

Master Duan Muwen's joining has brought an unprecedented R & D capability and confidence.

端木文老师的加盟为我们集团公司带来了空前的 研发 能力及信心.

Facing this unprecedented crisis, governments are frequently the introduction of various policies to adjust their economies.

面对着这次空前的危机, 各国政府都频繁的出台各种政策来调整本国的经济.

In an unprecedented move, the tribunal ask the witness to sing a song.

作为史无前例的步骤, 法庭要求证人唱一首歌.

In an unprecedented action, the army, on its own initiative, arrested seventeen civilians.

军队竟然擅自逮捕了17个平民, 这种行为简直是前所未有.

This achievement is surely unprecedented.

这成就确实是空前的.

A flood of this sort is really unprecedented.

这样大的洪水真是十年九不遇.

The situation is unprecedented in modern times.

这种情况在现代还没有出现过。

For churches not normally noted for their ability to act in unison, today's unprecedented move was all the more remarkable.

对于通常无法统一行动的各个教会来说，今天这一前所未有的举动无疑更加非同寻常。

• unprecedented%20rise">unprecedented rise空前涨价

• We are entering an age of abundance unprecedented in history.

  出自：A. E. Stevenson