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单词 ratchet
释义
ratchet
noun[C]
uk
/ˈrætʃ.ɪt/us
/ˈrætʃ.ɪt/

ratchetnoun[C](DEVICE)

apartof amachinethatallowsmovementin onedirectiononly. It is usually awheelwith teeth-likepartsthat eitherslideover orlockagainst thefreeend of abar:
棘轮，棘齿
The ratchet at the other end of theaxleonlyturnsone way.
Keep the ratchetmechanismlubricatedwithoil.
picture of ratchet
Kypros/Moment/GettyImages
(alsoratchet wrench)
atoolconsisting of ametalhandleand asocket, used forturningobjectsin onedirectiononly:
Theboltscan beremovedwith a ratchet.
I hadalmostevery ratchet andwrenchin thetoolcatalogueat mydisposal.
picture of ratchet
bbeltman/iStock/Getty Images Plus/GettyImages
More examples
  • Mosthandbrakesneed about fourclickson the ratchet -if yourstakesmuch more, agarageshouldadjustit.
  • Catapults wereloadedandcockedbymeansoflargewheelswith ratchets.
  • Walnutleaveshave ajaggedsawtoothedgeratherlike a ratchet.
  • the ratchets of adeckchair
SMART Vocabulary: related words and phrases
Machines - parts
  • air compressor
  • air filter
  • cogwheel
  • compressor
  • console
  • control panel
  • controller
  • cowl
  • differential gear
  • guard
  • instrumentation
  • jet
  • plunger
  • regulator
  • safety valve
  • slide
  • split pin
  • universal joint
  • vee belt
  • wheel
See more results »

You can also find related words, phrases, and synonyms in the topics:

Tools in general

ratchetnoun[C](NOISE-MAKER)

US
(alsorattle)
awoodendevicethat whenturnedaround and aroundproducesanoiselike aseriesofknocks
picture of ratchet
Floortje/iStock/Getty Images Plus/GettyImages
SMART Vocabulary: related words and phrases
Toys & dolls
  • balloon
  • building block
  • chew toy
  • doll's pram
  • fidget
  • fidget spinner
  • finger puppet
  • go-kart
  • marble
  • mud pie
  • rag doll
  • rocking horse
  • snow globe
  • sock puppet
  • soft toy
  • squirt gun
  • squishy
  • stacker
  • teddy
  • tricycle
See more results »

ratchetnoun[C](SITUATION)

something that makes asituationchangeordevelopin onedirectiononly, forexampleby beingabletorisebut notfallor the other way round:
Presidentialpoweroftenactslike aone-wayratchet: It can beincreasedfarmoreeasilythan it can bereduced.
Apriceratchetmeansthatpricesdo notmovedownwardbut arefreetomoveup.
SMART Vocabulary: related words and phrases
Not able to be changed
  • be no hard and fast rulesidiom
  • burnyourboats/bridgesidiom
  • congenital
  • continuity
  • deep-seated
  • incorrigible
  • incurably
  • inelastic
  • inelasticity
  • inflexible
  • irreversible
  • irreversibly
  • irrevocable
  • irrevocably
  • leopard
  • unadaptable
  • unalterable
  • unchangeable
  • uncompromising
  • uncompromisingly
See more results »
(Definition ofratchetfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)
ratchet
noun[C]
uk
/ˈrætʃ.ɪt/us
/ˈrætʃ.ɪt/
apartof amachinethatallowsmovementin onedirectiononly. It is usually awheelwith teeth-likepartsthat eitherslideover orlockagainst thefreeend of abar.
棘轮，棘齿

ratchet| American Dictionary

ratchet
verb[I/T]
us
/ˈrætʃ·ɪt/
tochangeanactivity,amount, orfeelingbydegrees:
[I]Interestratesalways ratchet down in anelectionyear.
[M]Critics aretryingto ratchet uppublicpressureonlawmakers.
(Definition ofratchetfrom theCambridge Academic Content Dictionary© Cambridge University Press)

ratchet| Business English

ratchet
noun[C]
uk
/ˈrætʃɪt/us
FINANCE,STOCK MARKET
anarrangementby whichmanagersare givenincreasingnumbersofsharesin acompanyinrelationtoincreasesinitsprofitsorsuccess:
Thesalehas beenrewardingfor thechiefexecutive, whoseoriginal20%stakegrewto 30% under a ratchetarrangement.
PRODUCTION
apartof amachinethatallowscontrolledmovementin onedirectiononly
asystemthatcontrolsactivity:
Tightening theinterest-rate ratchettocontrolinflationwouldrisktippingtheeconomyinto anastydownturn.
(Definition ofratchetfrom theCambridge Business English Dictionary© Cambridge University Press)

Examplesofratchet

ratchet
A popular explanation holds that large green jurisdictions have been forcing their trading partners to trade orratchetup their regulation.
From theCambridge English Corpus
We also examine the rate of theratchetwhen there are two classes of mutation of similar but unequal effects on fitness.
From theCambridge English Corpus
Increased dominance also, of course, reduces the rate of theratchet, because selection reduces the frequency of mutations even when they are heterozygous.
From theCambridge English Corpus
For each mean incoming s the region above the triangles will have a drive to theratchet.
From theCambridge English Corpus
The translocation involves a 'ratchet-like ' rotation of the small subunit with respect to the large subunit.
From theCambridge English Corpus
The rate of theratchetis the reciprocal of this time.
From theCambridge English Corpus
Although increasing migration does slow theratchetdown, its speed is always higher in the structured population, for all values of m tested.
From theCambridge English Corpus
The same will be true if theratchethas advanced sufficiently far that a substantial proportion of loci are fixed within haploid sets.
From theCambridge English Corpus
We have introduced in our random-network model these events in order to assess how important extinction is for the speed of theratchet.
From theCambridge English Corpus
If this least-loaded class is lost in the whole population, a click of theratchetis recorded.
From theCambridge English Corpus
All other parameters act only as scaling factors and do not influence the operation of theratchet.
From theCambridge English Corpus
This is described as a 'ratchet' process because only back-mutation can reverse it.
From theCambridge English Corpus
Medical cost control has followed aratchet-like pattern quite different from the zigzag of change and reversal seen in some other areas of health policy.
From theCambridge English Corpus
The figure shows large populations needing a mutation rate only slightly larger than the mean incoming s to ensure a drive to theratchet.
From theCambridge English Corpus
Self-correcting spontaneous economic impulses were suspended causing a 'ratcheteffect' that pushed upwards the equilibrium unemployment rate.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/ratchet##
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更新时间：2025/2/5 20:01:30