unprecedented

[ʌn'presidəntid]

adj.空前的, 前所未有的

例句与用法：

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。

词形变化：

副词: unprecedentedly |

详细释义：

a.

无先例的, 空前的[Z]

The rate of growth was unprecedented.

这个成长率是前所未有的。