英语翻译翻译Even during the ancient days,there was heavy traffic i
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英语翻译
翻译Even during the ancient days,there was heavy traffic in big cities,police officers had to stand at busy crossings the whole day
.they often were busy after working all day long.they carried a small lantern with red and green lights.red meant "to stop" and green meant“ to be careful”.the lantern was knocked by a lever below so that the right light would face traffic.however,this kind of lantern was often crispy because of the gas in the light bulb
As cars were invented,the situation got even worst.An American policeman,william potts,decided to do something to solve the problem.One day,while he was walking along a railway,potts noticed the railroad signals.then he got an idea——why not use them on streets?so potts used red,yellow,and green lights to make the next four-way traffic lights in the world.It was first used in 1920 on a corner in his city.within a year,fifteen of the new lights were used across his state.
翻译Even during the ancient days,there was heavy traffic in big cities,police officers had to stand at busy crossings the whole day
.they often were busy after working all day long.they carried a small lantern with red and green lights.red meant "to stop" and green meant“ to be careful”.the lantern was knocked by a lever below so that the right light would face traffic.however,this kind of lantern was often crispy because of the gas in the light bulb
As cars were invented,the situation got even worst.An American policeman,william potts,decided to do something to solve the problem.One day,while he was walking along a railway,potts noticed the railroad signals.then he got an idea——why not use them on streets?so potts used red,yellow,and green lights to make the next four-way traffic lights in the world.It was first used in 1920 on a corner in his city.within a year,fifteen of the new lights were used across his state.
即使在古代,交通繁忙的大城市,警察不得不站在繁忙的路口一整天.他们经常忙于工作后,终日.他们带着一个小灯笼与红色和绿色灯.红色的意思是“停止”和绿色的意思是“小心”.元宵被撞倒的杠杆,对光会面对交通.然而,这种灯笼往往是脆由于气体的灯泡随着汽车的发明,情况变得更加糟糕.美国警察,威廉,决定做一些解决问题.有一天,当他走在铁路,铁路信号波茨注意.他有一个想法——为什么不利用他们在街上吗?因此波茨用红色,黄色和绿色灯,使下一个四通交通灯的世界.这是第一次使用在1920个角落的城市中.一年内,十五的新灯,在他的国家.
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