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At the same time, extreme weather events like Category 5 hurricanes are becoming more frequent.

与此同时，5级飓风等极端气象事件出现得越来越频繁。

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And when those winds reach 156 miles per hour, you're dealing with a category 5 hurricane.

如果风速达到每小时156英里以上，那么你经历的就是五级飓风。

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5% And, it turns out that about 75% of the periodic table falls into this category.

而且，它表明元素周期表的,都属于这个种类。

麻省理工公开课 - 固态化学导论课程节选

The efforts are needed to help a region devastated by the Category 5 Hurricane Katrina.

NPR: Bush Promises New Orleans 'Will Rise Again'

Rather bland language to talk about the online equivalent of a Category 5 hurricane.

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The worst storm, a Category 5, has winds greater than 155 mph and can cause catastrophic damage.

CNN: 'Very active' hurricane season forecast