SSS 2011-01-26
时间：2018-12-24 作者：英语课 分类：Scientific American(一)月
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?
Living in the city, you can't escape traffic noise. But it's not just a nuisance. If you're over 65, the noise might be a risk to your health, too—by increasing your risk of a stroke. That's according to a study in the European Heart Journal.
The researchers studied over 51,000 Danish city dwellers 1 for about a decade. And they mapped out noise levels at each person's home over time, using a noise calculating program. After accounting 2 for other variables, like smoking history, diet and air pollution, they found that for the over-65 set, the risk of stroke rose 27 percent higher for every 10 decibels 3 of noise exposure. The baseline was the volume of a normal conversation.
This study doesn't prove that road noise causes strokes. But previous studies have linked noise to heart attacks and higher blood pressure, too—possibly due to increased stress and sleep disturbance 4. For older people who already have trouble sleeping, the researchers say that extra tossing and turning could be the cause. So don't just worry about the fumes 5 if you're relocating to a busy city street—keep in mind your sound health, too.
Thanks for the minute. For Scientific American's 60-Second Science, I'm Christopher Intagliata.
- City dwellers think country folk have provincial attitudes. 城里人以为乡下人思想迂腐。 来自《简明英汉词典》
- They have transformed themselves into permanent city dwellers. 他们已成为永久的城市居民。 来自《简明英汉词典》
- A job fell vacant in the accounting department.财会部出现了一个空缺。
- There's an accounting error in this entry.这笔账目里有差错。
- The typical lawn mower makes about 90 decibels of noise. 典型的割草机发出的声响约为90分贝。 来自《简明英汉词典》
- A normal conversation reaches 55 decibels. 普通的谈话即可达55分贝。 来自《简明英汉词典》
- He is suffering an emotional disturbance.他的情绪受到了困扰。
- You can work in here without any disturbance.在这儿你可不受任何干扰地工作。