SSS 2009-06-22
时间：2018-12-24 作者：英语课 分类：Scientific American(六)月
This is Scientific American’s 60-Second Science, I’m Steve Mirsky. Got a minute?
“Stand clear of the closing doors, please.” Definitely keep your arms and legs away from the closing doors on the subway. But there’s a potentially more insidious 1 danger to your health - the noise.
Mass transit 2 is generally a safe way to travel, one reason why 33 million Americans use it every weekday. But a study that compared the various modes of mass transit in New York City found that the subways topped all other transit types for average noise, at a grinding 80 decibels 4. The din 3 was sometimes worse on the platforms, topping out at 102 decibels. Commuter 6 trains were much quieter, at about 75 decibels. Remember, that’s on a log scale, so, for example, 80 is actually 10 times noisier than 70—and about three times louder than 75. Normal conversation is between 60 and 70 decibels. The study is in the American Journal of Public Health.
The EPA and the World Health Organization recommend daily averages of no more than 70 decibels to protect your hearing. So earplugs may be in order if your particular commute 5 is literally 7 deafening 8.
- That insidious man bad-mouthed me to almost everyone else.那个阴险的家伙几乎见人便说我的坏话。
- Organized crime has an insidious influence on all who come into contact with it.所有和集团犯罪有关的人都会不知不觉地受坏影响。
- His luggage was lost in transit.他的行李在运送中丢失。
- The canal can transit a total of 50 ships daily.这条运河每天能通过50条船。
- The bustle and din gradually faded to silence as night advanced.随着夜越来越深，喧闹声逐渐沉寂。
- They tried to make themselves heard over the din of the crowd.他们力图让自己的声音盖过人群的喧闹声。
- 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》
- I spend much less time on my commute to work now.我现在工作的往返时间要节省好多。
- Most office workers commute from the suburbs.很多公司的职员都是从郊外来上班的。