史无前例

I don't know what to do, this is totally unprecedented.

我不知道，这是史无前例的。

A preliminary temperature series of the past l 000 years has been reconstructed mainly based on tree ring data in the west and historical record in the east.

从全国范围看，11世纪末和13世纪中的温暖程度可能均超过了20世纪30-40年代暖期，表明20世纪的增暖可能并非史无前例。

Duality of Systems Science and Systems EngineeringBased on the trialism of science,technology and engineering,the demarcation between Systems Science and Systems Engineering is presented.

目前，我国处于经济建设快速发展时期，正在进行史无前例、规模空前的工程建设，而系统工程并未随着工程建设大潮而蓬勃发展，未能完全满足工程时代的需要。

The civil development of industrial economic, which brings significantly wealthy material, makes unprecedented progress in living standard, and yet it leads uncompensated breakage for the environmental system, which supports human to live.

工业经济的文明发展，给人类带来了极大丰富的物质文明，使人们的生活水平得到了史无前例的提高，但同时也给人类的生命支持系统——环境带来了难以弥补的破坏。

But it may be that an unprecedented demand and need for undelayed action may call for temporary departure from that normal balance of public procedure.

然而，史无前例的要求和迅即行动的需要也可能使我们有必要暂时背离正常分权的公开程序。

A time of unexampled prosperity.

一个史无前例的富裕时代。

It is very timely for us to review the draft resolution on "Strengthening emergency relief, rehabilitation, reconstruction and prevention in the aftermath of the Indian Ocean tsunami disaster" submitted by Laos at today's resumed meeting of the 59th UNGA session on post-earthquake and tsunami issues.

印度洋海啸是全人类的灾难，国际社会对此作出了积极和强烈的反应，并开展了史无前例的紧急人道主义救援行动。联合国在这次国际救灾工作中发挥了重要的领导和协调作用。

This is something unheard of in history .

这是史无前例的事。。。

And that means mass protest on unprecedented scale.

这代表我们需要史无前例的大规模抗议。

I don't know. This is unprecedented.

我不知道，这是史无前例的

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。