SSS 2012-02-24
时间：2018-12-24 作者：英语课 分类：Scientific American(二)月
英语课
This is Scientific American 60 second science, I am Amy Kraft, Got a minute?
Newly licensed 1 drivers who make sharp turns and come to sudden screeching 2 stops are nerve-wracking. And now there’s evidence to confirm that erratic 3 driving by teens predicts their odds 4 of accidents.
Researchers installed computer and camera equipment on the cars of 42 newly licensed drivers to measure what they called “elevated g-force events,” like quick turns and jamming on the brakes.
The researchers tracked the newbies for 18 months, and found that g-force event numbers let them make good bets on who was most likely to crash the car. Data showed that for every 100 miles on the road, elevated g-force events ranged from near zero for some drivers to as high as 50 for others. And drivers with the highest rate ofg-force events showed greater instances of fender benders, crashes or close calls.
All told, 26 teens were involved in 37 impacts. The entire cohort experienced 242 near misses. The study is in the American Journal of Epidemiology.
The research points to the need to monitor new drivers—and to better steer 5 a heavy foot in the right direction.
Thanks for the minute, for scientific American 60 second Science, I'm Amy Kraft
1 licensed
adj.得到许可的v.许可，颁发执照(license的过去式和过去分词)
- The new drug has not yet been licensed in the US. 这种新药尚未在美国获得许可。
- Is that gun licensed? 那支枪有持枪执照吗？
2 screeching
v.发出尖叫声( screech的现在分词 )；发出粗而刺耳的声音；高叫
- Monkeys were screeching in the trees. 猴子在树上吱吱地叫着。
- the unedifying sight of the two party leaders screeching at each other 两党党魁狺狺对吠的讨厌情景
3 erratic
adj.古怪的，反复无常的，不稳定的
- The old man had always been cranky and erratic.那老头儿性情古怪,反复无常。
- The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。