Narrow valleys could amplify a wave set off by falling rocks, sending a wall of water downriver.

狭窄的峡谷会起到放大岩石塌落所激起水浪的作用，引发下游巨浪。

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The wave set off tsunami alerts across the Pacific, as far away as South America, New Zealand and the U. S. west coast.

巨浪使太平洋沿线拉响了海啸警报，影响范围远达南美，新西兰和美国西海岸。

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The incident set off a wave of fear and anger across the country.

VOA: special.2010.05.06

The death of Habyarimana,a Hutu, set off a wave of violence against Rwanda's Tutsi minority.

VOA: standard.2009.04.10

Expect this to set off a wave of similar set-ups at media outlets across the world.

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So, at this time, we will watch to see if 5 waves will complete the a-wave, or if we are in the b-wave, with a nice opportunity set up to short USO for a c-wave down to at least 32, with the potential to drop all the way down to 29.

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In the next chapter of the Great North American Oil And Gas Boom, a wave of consolidation is set to hit the U.S. oil and gas industry.

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