unprecedented

unprecedented汉语翻译：
a. 空前的
【经】 空前的, 无前例的词型变化：
副词:unprecedentedly英语解释：
形容词 unprecedented:

having no precedent; novel

Science and technology have come to pervade every aspect of our lives and, as a result, society is changing at a speed which is quite unprecedented.科学和技术已经开始渗透了我们生活的各个领域; 结果，社会正以空前的速度改变着。

We are seeing unemployment on an unprecedented scale.我们现在正经历规模空前的失业现象。

That is a situation unprecedented in the history of the school.这是该校有史以来未曾出现过的情况。

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。