noun下载🔗分享拨链器，变速器 The mechanism on a bicycle used to move the chain from one sprocket (gear) to another.例子:"The cyclist adjusted the derailleur to shift gears while climbing the hill. "骑车人在爬坡的时候调整了拨链器（变速器），以便换挡。vehiclemachinedevicepartsporttechnical与AI对话词汇游戏阅读练习
noun下载🔗分享拨链器，变速器 The entire gearset on a bicycle with such a mechanism.例子:"The bicycle mechanic adjusted the derailleur to make the gear changes smoother. "自行车修理工调整了变速器，让换挡更顺畅。vehiclemachineparttechnology与AI对话词汇游戏阅读练习
