We have also heard about unprecedented rises in prices of gas, for example.

例如，我们还听说了天然气价格的空前上涨。

The agency says there's been an unprecedented rise in outbreaks of the waterborne disease worldwide.

世卫组织称，这种通过水传播的疾病在全球正以空前的趋势蔓延。

The world health body said the shortage happened " at a time of unprecedented rise in cholera outbreaks worldwide."

世界卫生组织表示，霍乱疫苗短缺发生在“全球霍乱病例空前增加之际”。

With the Asian middle class ballooning, disposable incomes in the region are witnessing an unprecedented rise.

随着亚洲中产阶级的不断壮大，该地区的可支配收入出现了前所未有的增长。