Starley of England devised the more modern bike with a chain and gearing to allow the wheels to be of equal size.

使用滚珠轴承及链条设计出了前、后车轮大小一样的现代自行车。

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Starley of England devised the more modern bike with a chain and gearing to allow the wheels to be of equal size.

使用滚珠轴承及链条设计出了前、后车轮大小一样的现代自行车。

youdao