CNN News: 超过15%的世界人口患有高血压

Scientists said Imperial College London recently studied world blood pressure statistics between 1975 and 2015, and here`s what they found: 1.13 billion people, more than 15 percent of the world`s population now have high blood pressure. That`s almost twice the number of people affected 40 years ago, but this is also because the world population has increased in the last 40 years and gotten older. Those with higher blood pressure today tend to live in poorer parts of the world.

科学家表示，帝国理工学院最近研究了1975年到2015年的世界血压统计数据。研究结果如下：11.3亿人，约有超过15%的世界人口患有高血压。这几乎是40年前两倍。当然，其中的部分原因是在过去的40年，世界人口不断增加，同时，人口老龄化。而现在患有高血压的人往往生活在地球上比较贫困的地区。

What causes elevated blood pressure? Lots of salt and potassium in diets, pollution and exposure to lead, and bad nutrition in childhood.

造成血压升高的原因是什么?饮食中还有大量的盐和钾，接触铅以及幼时影响不足。

High blood pressure can increase your risk of strokes, heart, and kidney disease. But blood pressures aren`t rising everywhere. Rates have dropped in the U.S. and Canada. Experts say better food options and health services have helped.

高血压会增加患中风、心脏病和肾脏的危险。但是并非所有地区血压都在升高。美国和加拿大的高血压患病率下降。专家表示，更好的食物选择以及医疗服务都有帮助。

The drought in the U.S. southeast has contributed to the spread of dozens of wildfires. The U.S. Forest Service says more than 30 large fires have scorched more than 80,000 acres. That`s like 80,000 football fields in Alabama, Georgia, Kentucky, North and South Carolina, and Tennessee.

美国东南部的干旱导致了许多森林大火的蔓延。美国林务局表示,30多场大型火灾烧焦超过80000英亩。阿拉巴马州,乔治亚州,肯塔基州,北和南卡罗来纳,田纳西的所烧的面积约为

But that`s just the big fires. Yesterday, there were more than 67 total fires burning in Tennessee alone. There are states of emergency in several places hundreds of people have been hospitalized in Tennessee with breathing problems related to the fires.

但这只是火灾。昨天,仅田纳西州就发生67场火灾燃烧。昨日，田纳西州由于大火引发的呼吸问题导致成百上千人已经紧急送往医院接受治疗。

Wednesday`s air quality index in Atlanta, Georgia, miles away from any of the fires, was unhealthy. In Chattanooga, Tennessee, it was 151. What exactly does that mean?

离火灾较远的亚特兰大,乔治亚州空气指数是不健康的。而在田纳西州的查塔努加，空气指数为151，这个数字意味着什么呢?