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单词 diurnal
释义
diurnal
adjective
uk
/ˌdaɪˈɜː.nəl/us
/ˌdaɪˈɝː.nəl/
biologyspecialized
beingactiveorhappeningduring thedayratherthan atnight:
The Ethiopianwolfismostlydiurnal, butbecomesnocturnalinareaswhere it ispersecuted.
diurnalactivity
formal
happeningover aperiodof aday:
the diurnalrotationof theearth
Compare
nocturnal
More examples
  • thesunlithourswhen diurnalbirdsare about
  • Humans arenormallydiurnal, but we are not asimmutableasplantsor otheranimals.
  • Thetigersin theparkhavebecomediurnal, making it one of thebestplacestoseetigersinIndia.
  • Ragweedfollowsasteadydiurnalcycle,releasingpollenatdawnandachievingpeakairborneconcentrationsnearnoon.
  • Thesemountainshave aprolongedperiodof diurnal freeze-thaw thatshatterstherockandloosensthefragments.
SMART Vocabulary: related words and phrases
Animal (non-human) behaviour
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You can also find related words, phrases, and synonyms in the topics:

Days & times of day

Related word

diurnally
(Definition ofdiurnalfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)
Examples from literature
  • But he probably neglected to keep diurnal notes.
  • Of the former they have no measure but the visible diurnal motion of the sun or the monthly revolution of the moon.
  • The diurnal revolution of the earth brings the joyful sunrise and the pathetic sunset.
diurnal
adjective
biologyspecialized
uk
/ˌdaɪˈɜː.nəl/us
/ˌdaɪˈɝː.nəl/
happeningover aperiodof aday, or beingactiveorhappeningduring thedayratherthan atnight
在一天内发生的；白天发生的；昼行性的
Compare
nocturnalformal

Examplesofdiurnal

diurnal
This represents an independent evolution of spectral diversity in response to selection after returning to adiurnallifestyle.
From theCambridge English Corpus
The common type of colic cry, without organic alterations, follows adiurnalrhythm and occurs mainly in the afternoon and early evening hours.
From theCambridge English Corpus
These relate to differentdiurnal, and monthly, tidal stages, and serve as important features for hunting and safety assessment in each community.
From theCambridge English Corpus
As watches werediurnal, visits by nocturnal canopy animals were not recorded, although we found no evidence of high levels of nocturnal fruit removal.
From theCambridge English Corpus
However, the high resilience maltreated children exhibited a distinctive pattern ofdiurnalvariation.
From theCambridge English Corpus
None of the surrogate-reared rhesus infants exhibited the normaldiurnaldecrease in cortisol over the daytime hours.
From theCambridge English Corpus
Thediurnalrhythm of crying becomes progressively more distinct, reflecting the increasing strength of the circadian drive.
From theCambridge English Corpus
The trajectories of the planet'sdiurnalmotion therefore lie between these two circles.
From theCambridge English Corpus
Another process that affects the higher desiccation rate of cleared areas is thediurnalcycle of temperature and wind.
From theCambridge English Corpus
The thermal inertia in turn affects the surface temperature and itsdiurnalamplitude.
From theCambridge English Corpus
Diurnalvariation in human visual sensitivity determined by incremental thresholds.
From theCambridge English Corpus
Is it possible that individual differences in testosterone levels ordiurnalvariation are associated with risk for internalizing problems in youth?
From theCambridge English Corpus
No differences in activity times were apparent amongdiurnalspecies.
From theCambridge English Corpus
All species arediurnal, terrestrial frugivores and are subjected to intra-specific competition for resources and a seasonal fluctuation in food availability.
From theCambridge English Corpus
The diversity and biomass of all frugivores can explain the large difference indiurnalterrestrial frugivores between sites.
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/diurnal##
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更新时间：2025/1/14 16:43:53