on a bicycle

汉语翻译

例句：

1. 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
2. This hill is too steep to ride up on a bicycle.
   这山太陡了，骑自行车可上不去。