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词汇 ratch
释义 ratch 英rætʃ美rætʃ
基本英英近义反义
n.棘轮⁴⁰;棘齿⁶⁰

Noun:
mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction近义词 ratchet棘轮rachet 防止倒转的棘齿…
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