According to the London-based International Maritime Bureau, there was a significant upsurge in piracy in 2008.

VOA: standard.2009.10.30

We'll be going over them again and finding them, I hope, ; more fascinating as we learn more about them; but at the same time, even as I rattle off this list of possibilities, probably you felt in yourself an upsurge of skepticism.

我希望通过学习会发现，它们越来越有趣;,但同时，当我说完这些定义以后，你心中也许会充满怀疑。

耶鲁公开课 - 文学理论导论课程节选

The upsurge in violence came a day before the first anniversary of the Gaza War,in which more than 1,100 Palestinians and 13 Israelis were killed.

VOA: standard.2009.12.26