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[今日口语] It's never too late to mend.

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这个单词你近期已经查过5次了,小D建议你将它收录到单词本。收录 / 忽略

rack railway

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齿轨铁道,齿条铁路

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  1. railway for steep mountains; a cogwheel on the locomotive engages cogs on a center rail to provide traction
    [同] cog railway, rack railway
 
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