The recent unprecedented rise that we have seen in agricultural commodity prices is showing no signs of letting up.

我们看到，最近农产品价格空前上涨，而且丝毫没有停止的迹象。

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The unprecedented rise of new threats has deemed traditional security mechanisms both ineffective and unreliable in providing adequate defense.

新型威胁的空前增长表明传统安全机制难以提供充分的防御。

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This "rise of the rest" is a remarkable achievement, bringing with it unprecedented improvements in living standards for the majority of people on the planet.

“其余国家的崛起”是一个非凡的成就，使得全球大多数人的生活水平得到空前提高。

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It should be noted that no Keynesian made a similar contribution to China's unprecedented rise.

ECONOMIST: Letters

That has been coupled with an unprecedented rise in prosperity, particularly in the big cities, which in turn has helped spread nouveau-riche-type attitudes among the prospering classes.

CNN: LITTLE EMPERORS

The length of the downturn (the longest since the Depression) and the weakness of the recovery have combined to generate an unprecedented rise in the rate of long-term unemployment.

ECONOMIST: Unemployment benefits