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单词 decay
释义
decay
verb
uk
/dɪˈkeɪ/us
/dɪˈkeɪ/
B2[IorT]
tobecomegraduallydamaged,worse, or less; tocausesomething to do this:
腐蚀；（使）衰败，（使）衰弱
Sugar makesyourteethdecay.糖能引起蛀牙。
Theroleof theextendedfamilyhas been decaying for sometime.大家庭的作用开始减弱已经有一段时间了。
Pollution has decayed thesurfaceof thestoneworkon thefrontof thecathedral.大教堂前部的石刻表面已经因为污染受到了侵蚀。
thesmellof decayingmeat腐肉气味
[I]physicsspecialized
If aradioactivesubstancedecays, itchangesto a differentform,producingradiation:
（放射性物质）衰变
Radioactiveuraniumdecaysintostableleadat aknownrate.放射性铀以已知的速率衰变为稳定的铅。
As the actinium-225 decays, it gives offshort-lived,highlyenergizedalphaparticles.随着锕-225的衰变，它会释放出寿命短、能量高的α粒子。
More examples
  • Floating in thedirtyriverweredeadfish, alreadystartingto decay.
  • Thebacterialiveonfoodparticlesandproduceacidthat decays theenamelonyourteeth.
  • Thefleshon adeadbodydecays veryrapidly.
  • It'ssadtowatchabeautifulrosewitherand decay in such ashorttime.
  • Plants andanimalsdecay into thesoil,replenishingthemineralsandnutrients.
SMART Vocabulary: related words and phrases
Decaying and staying fresh
  • best-before date
  • biodegradable
  • biodegrade
  • compost
  • decompose
  • decomposition
  • go off
  • nonperishable
  • nutrient cycling
  • out of date
  • perish
  • perishable
  • pull date
  • rack
  • seed
  • sell-by date
  • shrivel
  • shrivelled
  • spoil
  • spoilage
See more results »

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

Deteriorating and making worse
Physical & chemical processes
Physics: radiation & radioactivity
decay
noun[U]
uk
/dɪˈkeɪ/us
/dɪˈkeɪ/
C2
theprocessof decaying:
腐蚀；衰败，衰弱
environmental/industrial/moral/urbandecay环境恶化／工业衰退／道德沦丧／城市衰落
dental/toothdecay蛀牙
Thebuildingshadstartedtofallintodecay.那些建筑已经开始破败了。
Thisindustryhas beenindecay for sometime.这个行业早就开始衰退了。
physicsspecialized
theprocessby which aradioactivesubstancechangesto a differentform,producingradiation:
（放射性物质的）衰变
Radon isemittedin thenaturaldecay ofradioactivematerialsinrockandsoil.氡是岩石和土壤中的放射性物质在自然衰变的过程中释放出来的。
the decayrateof beryllium-7铍-7的衰变率
More examples
  • Manychildrencome to us withseveredentaldecay.
  • Unemployment andinnercitydecay areinseparableissueswhich must betackledtogether.
  • Sugar is amajorcauseoftoothdecay.
  • Themansionhad anatmosphereofgenteeleleganceand decay.
  • Areas of the mostseriousurbandecay are toreceivefundsfor newbuildingandredevelopmentschemes.
SMART Vocabulary: related words and phrases
Decaying and staying fresh
  • best-before date
  • biodegradable
  • biodegrade
  • compost
  • decompose
  • decomposition
  • go off
  • nonperishable
  • nutrient cycling
  • out of date
  • perish
  • perishable
  • pull date
  • rack
  • seed
  • sell-by date
  • shrivel
  • shrivelled
  • spoil
  • spoilage
See more results »

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

Physical & chemical processes
Physics: radiation & radioactivity
(Definition ofdecayfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

decay| American Dictionary

decay
noun[U]
us
/dɪˈkeɪ/
damage, or astatethatbecomesgraduallyworse:
Thedentistsays I have a lot oftoothdecay.
There’s still too muchcrime,poverty, and decay in theneighborhood.
Yourattitudejustcontributesto thegrowingsocialdecay.

decaynoun[U](PROCESS)

physicsus/dɪˈkeɪ/
theprocessby which aradioactivesubstancebreaksdown andsendsoutharmfulradiation

decay

verb[I/T]us
/dɪˈkeɪ/
[I]Cityservicesarerapidlydecaying.

decaying

adjective[not gradable]us
/dɪˈkeɪ·ɪŋ/
Emptylotsstandnext toabandoned, decayingbuildings.
(Definition ofdecayfrom theCambridge Academic Content Dictionary© Cambridge University Press)

Examplesofdecay

decay
Conversely, no scattered particles exist at early times, and instead the scattered distribution grows from zero as the unscattered streaming distribution decays.
From theCambridge English Corpus
The case where a lower-hybrid pump wave decays into daughter and ion-cyclotron waves in a plasma with ion-temperature anisotropy is considered.
From theCambridge English Corpus
Ideally there should be eight perceivable repetitions (decaying away) which would be an octave transposition (8 6 3/4 tone) in all.
From theCambridge English Corpus
Assume that we take initial conditions so that this magnitude decays.
From theCambridge English Corpus
The monastic community itself had decayed because no ordination had taken place for a considerable time.
From theCambridge English Corpus
Regressing to models of decaying exponentials led to improved quality in the synthesis of several of the percussive tracks.
From theCambridge English Corpus
Such regions and waves cannot exist in isotropic plasmas, where the wave is a superposition only of oscillating or of exponentially decaying partial waves.
From theCambridge English Corpus
The reverse is true for wall pressure, which decays less rapidly in continuum flow.
From theCambridge English Corpus
At marginal instability, the real part of only one eigenvalue changes sign from negative (decaying disturbance) t o positive (growing disturbance).
From theCambridge English Corpus
Indeed, it seems that it is this lacunarity what makes possible certain properties such as decays of correlations and the central limit theorem.
From theCambridge English Corpus
If one adds a damping term, the oscillation decays.
From theCambridge English Corpus
Diaspores are gravity dispersed and the seed coat rapidly decays, exposing cotyledons to the immediate environment prior to germination.
From theCambridge English Corpus
Seeds were either already decayed or were in the process of decaying.
From theCambridge English Corpus
Manly independence decayed as the individual allowed his body to be built up by such "external" forces of the "non-ego" (1904 247).
From theCambridge English Corpus
Many of these were envisioned as artistic undertakings that would ameliorate the urban environment, such as improving water supplies or cleaning up decayed neighborhoods.
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.

Collocationswithdecay

decay

These are words often used in combination withdecay.

Click on a collocation to see more examples of it.

decay mode
The second employs the lower-hybrid wave as the decay mode.
From theCambridge English Corpus
decay product
In 1983, they repeated the experiment using a new technique: measurement of alpha decay from adecayproductthat had been separated out chemically.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
dental decay
The addition of a very small amount of fluoride to drinking water in appropriate localities likewise prevents or reduces dental decay, but on this matter there has been considerable resistance.
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/decay##
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更新时间：2025/3/10 6:22:21