孩子们在那里用小轮自行车和滑板表演绝活。
The kids were there with their BMX bikes and skateboards doing tricks.
山图也发了联合飞轮加上后轮，称为股枢纽于1969年，小轮自行车。
SunTour also made a combined freewheel plus rear hub, called Unit-Hub, in 1969 for small wheel bicycles.
小轮自行车，如斯特日达能采取一些习惯-一些乘客也很容易对他们倒下了。
Small wheeled bikes like the Strida can take some getting used to - some riders find it easy to topple over on them.
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