自行车齿轮 meaning in English
bicycle gear
Examples
- Constantly watching their gear ratio , it is hell
自行车齿轮比维持不变,这太折磨人了 - A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes
脱轨器，转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮（换档）的装置