Level 6 · word 19,270 of 20,000
ratchet
/ˈrætʃɪt/
American
- n. 棘轮, 棘爪
- Definition
- n. a device with a toothed wheel that allows movement in only one direction
- Example
- He tightened the bolt using a small metal ratchet.
- 他用一把小棘轮扳手把螺栓拧紧。
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