史无前例的

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

我不知道，这是史无前例的。

A time of unexampled prosperity.

一个史无前例的富裕时代。

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

We are living in a time of unprecedented change.

我们正生活在一个史无前例的改变中。

We began to cooperate in other ways, in unprecedented ways, in science and technology.

我们开始合作在其它方式，用史无前例的方式，在科学和技术。

It is unprecedented in China.

这在中国是史无前例的。

The workers' and Peasants' Red Army victoriously completed its unprecedented 25,000 li Long March.

工农红军胜利地完成了史无前例的二万五千里长征。

It's off the charts.

它是史无前例的。

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。