Word · Frequency #24504
ratchet
棘轮机构
核心释义
a mechanical device that allows motion in only one direction, consisting of a toothed wheel or rack and a pawl
- 1.
用于卡住或推动棘轮的棘爪、卡爪或止动装置。
A pawl, click, or detent for holding or propelling a ratchet wheel, or ratch, etc.
- 2.
由棘轮或齿条与棘爪组成的机械装置,仅允许单向运动
mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
- 3.
由棘轮和棘爪组成的机构。
A mechanism composed of a ratchet wheel, or ratch and pawl.
- 4.
棘轮扳手。
A ratchet wrench.
- 5.
单向(通常为上升)的程序或规定。
A procedure or regulation that goes in one direction, usually up.
- 6.
通过在序列中前进为每条消息生成新唯一密钥的机制。
A mechanism for generating a new unique key for each message by moving forward in a sequence.
- 7.
一种发声器或乐器,通过板敲击旋转齿轮发声。
A noisemaker or musical instrument where sound is generated by a board striking against a rotating gear.
棘轮扳手；棘爪；棘轮效应；棘轮噪响器；密钥棘轮
用法In use
The mechanic used a ratchet to tighten the bolts on the engine.
用法提示：此处 ratchet 作名词，指一种带有棘轮机构的工具，用于单向旋转。
The ratchet on the winch prevents the cable from unwinding when the handle is released.
用法提示：此句中 ratchet 指棘轮机构，用于防逆转。
He heard a clicking sound from the ratchet as he turned the gear.
用法提示：这里 ratchet 指棘轮本身，发出咔嗒声是其典型特征。
use a ratchet to do sth
此处的 ratchet 指棘轮扳手，是可数名词。
He used a ratchet to remove the bolts.
他用棘轮扳手卸下了螺栓。
ratchet + noun
ratchet 可直接作定语修饰工具，如 ratchet wrench、ratchet screwdriver 等。
相关词与表达Connections
搭配Collocations
- ratchet wrench
- 棘轮扳手
- He used a ratchet wrench to loosen the bolt.他用棘轮扳手松开了螺栓。
- ratchet mechanism
- 棘轮机构
- The ratchet mechanism allows the wheel to turn in only one direction.棘轮机构使轮子只能单向转动。
- ratchet effect
- 棘轮效应
- The ratchet effect makes the policy hard to reverse once introduced.棘轮效应使这项政策一旦推出就难以逆转。
- ratchet strap
- 棘轮绑带
- Secure the cargo with ratchet straps before driving.开车前用棘轮绑带固定货物。
- ratchet wheel
学习提示Learner notes
记忆技巧Memory Tip
记忆：rat(老鼠)+chet，像老鼠咬住棘轮齿，只能咔嗒向前、不能倒退。
语境与语域Context & Register
语域：neutral 常见场景：机械维修、五金工具、技术说明 作为名词，ratchet 通常指棘轮机构或棘轮扳手，多用于机械维修、五金工具和技术说明等语境；日常口语和书面语中都比较常见。
发音与拼写Pronunciation & Spelling
这些词都含有 -tch 拼写，但都不与 ratchet /ˈrætʃət/ 完全押韵：ratchet 末尾是 /tʃət/，hatchet 末尾是 /tʃɪt/，而 catch、patch、watch、latch、sketch 都是以单音节 /tʃ/ 结尾。它们只共享 -tch 拼写和 /tʃ/ 发音，注意元音不同。
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.