ratchet基本解释
n,[机]棘轮；棘齿,同近
ratchet相关例句和用法The chair has a ratchet below it to adjust the height..这把椅子下面有一个棘轮来调整高度。
ratchet英英释义棘轮；棘齿英释中释na machine part consisting of a wheel or bar with teeth on it, which allows movement in only one direction
ratchet短语ratchet wheel,n. [机]棘轮.短语
