英语词汇derailleur怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	derailleur
释义	derailleur/diˈreilə, -ljə/n. a bicycle gear in which the ratio is changed by switching the line of the chain while pedalling so that it jumps to a different sprocket (自行车的)变速器，换档装置 [French dérailleur (as DERAIL)]
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