n.（防倒转的）棘齿；vt.安装棘轮于；松脱；把…造成棘齿形，于…作棘齿，在…上刻锯齿； 变形： 复数：ratchets过去式：ratcheted过去分词：ratcheted现在分词：ratcheting第三人称单数：ratchets 英英释义： ratchet[ 'rætʃit ]n.mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one