现代自行车的原型称作penny-farthing（一种前轮大后轮小的自行车）。
The ancestor of the modern bicycle was called a penny-farthing.
后轮旋转起来，小货车冲过了最后几英尺。
The back wheels spun and the van spurted up the last few feet.
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.
屋外，能看到警察正在检查轻型小货车上令小家伙死于非命的那个后轮，而孩子的父母则相拥着站在一旁。
Outside, the police could be seen inspecting the fatal rear wheel of the pickup while the child's mother and father leaned in each other's arms.
车架阳极氧化，小轮轴采用双轴承，带减震橡胶，较座，8“前轮，24”后轮，双支撑，附安全带。
Aluminum oxidation frame, soft cushion, 8 "front caster and 24" rear wheel, double brace, whit safety belt.
变型拖拉机受生产使用条件及结构设计等因素的影响，载荷分配一般是前轴载荷偏大，同步附着系数小，在制动状态下易出现后轮先抱死而发生后轴侧滑，制动性能降低。
With the limit of the use condition and structure of derivate tractor, its front load distribution is more than that of the rear and synchronism adhesion coefficient is small.
变型拖拉机受生产使用条件及结构设计等因素的影响，载荷分配一般是前轴载荷偏大，同步附着系数小，在制动状态下易出现后轮先抱死而发生后轴侧滑，制动性能降低。
With the limit of the use condition and structure of derivate tractor, its front load distribution is more than that of the rear and synchronism adhesion coefficient is small.
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