据托福听力小编以往的经验，火灾和龙卷风之间是没有关系的，但是小编在整理托福听力背景材料的时候，尤其是看到这篇的时候，简直颠覆了小编的“世界观”！大家快来围观。
What could fires in Central America have to do with the deadliest outbreak of tornadoes in recent U.S. history? More than you might think, according to a new study. Researchers found that smoke wafting north from the Gulf of Mexico worsened the already-stormy weather brewing across the southeastern US on April 27, 2011. That afternoon, 122 twisters tore across the country, killing 313 people.
在中美洲火灾与最近美国历史上最致命的龙卷风爆发有什么关系？据一项新的研究表明，你可能会想多。研究者发现从北部的墨西哥湾的烟恶化了2011年4月27号天气已经在酝酿的一场暴风。那天下午，122年的龙卷风厮杀着这个城市，死了313个人。
"It’s not that the outbreak happened because of the smoke." Pablo Saide, of the University of Iowa, and an author of a new study published in the journal Geophysical Research Letters.
这不是爆发，而是由烟导致的。巴勃罗·赛德，爱荷华州(美国州名)大学的，发表在地理快报的作者。
Smoke consists of tiny particles, called aerosols, which can have complicated effects on weather. So Saide used a model to explore whether these particles influenced the tornado outbreak of April 27. He found smoke made twisters more likely to strike, and more ferocious when they did. However, at the moment, weather forecasts don’t consider aerosol particles.
烟由微小的粒子组成的，叫做气溶胶，它对天气有复杂的影响。所以Saide用一个例子去探索这些粒子是否会影响4月27日龙卷风的爆发。他发现烟使龙卷风更加可能袭击，使暴风更加激烈。然而，与此同时天气预报不考虑这些气溶胶颗粒。
"This is difficult because weather models need to be finished very fast—because you want weather predictions for today, not for tomorrow. And including these aerosols makes it slower."
天气模型需要完成的很快，这是困难的。因为你想要预测今天的天气预报，并不是明天的。包括这些气溶胶使它们变得比较慢。
But Saide thinks it’s worth it. He says understanding the role of smoke and other airborne particles will help forecasters predict when weather conditions might change from dreary to deadly.
但是Saide这是值得的。他说理解了烟的角色和其他的大气尘可以帮助天气预报员预测天气状况以至于可以改变沉闷到致命。
好了，这就是颠覆小编世界观的材料，有没有很不可思议，快快积累吧！更多托福考试资讯请关注前程百利。
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