大约一九一零年，装有发动机的四轮车开始取代马车。
Around 1910 motorized carriages were beginning to replace horse-drawn cabs.
构筑物底板下安装有一组万向轮，年轻人完全可以根据自己的需要，自己推动建筑，完成空间的再造。
There is a set of universal wheels under the structure plate, young people can move the mobile structures and reconstruct space.
有些三轮车装有引擎，但是大部分是人力的，乘客坐在车的右侧。
Some are equipped with an engine, but most of them rely on pedal-power, with the passenger sitting on the right side.
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