Past / Many years ago, In the past, Many years ago, When she was a child, In the old days, A mountain porter, A boat on the Yangtze River, Transport used to be very slow, Travel was difficult, Climb mountains to get from place to place, Use boats to move around, Made long journeys by land or sea, Seldom travelled by air, Write letters by hand, Used to ride a train, No computers back in those days, Today / Nowadays, Today, Nowadays, Life today, An international city, A modern city, A tunnel, Dongshuimen Yangtze River Bridge, Ships and planes transport goods, Trucks take goods to stores and homes, More than 14,000 bridges [音频内容], Bus stops and underground stations, Highways and bridges are everywhere, Tourists from all over the world, Tons of songs on smartphone, Send emails

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