友情提醒：点击  ，可以收听真人发音
rachet ['rætʃit]    添加到生词本 复制网址
基本释义
  • (防倒转的)棘齿
英英解释

  • 　1个名词解释

    1. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
      [同] rachet, ratch, ratchet