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单词 captcha
释义
captcha
noun[CorU]
uk
/ˈkæp.tʃə/us
/ˈkæp.tʃə/
internet & telecomsspecialized
asystemthat is used to makesurethat ahumanbeing, not amachine, is using acomputer. Thepersonmay beaskedtotypein aseriesoflettersornumbers, or tocompleteasimplegame. The word captcha is made up of the firstlettersof words in the phraseCompletely Automated Public TuringtesttotellComputers and Humans Apart:
（用于确认计算机使用者是人而非机器的系统）验证码
Theleadingticketsaleswebsiteis tostopusing thehumanverificationsystemcaptcha infavourof something moreuser-friendly.几家最大的售票网站放弃了人机鉴别验证码系统，转而采用界面更为友好的办法。
SMART Vocabulary: related words and phrases
Internet terminology
  • above/below the foldidiom
  • address bar
  • affiliate link
  • affiliate marketing
  • all-you-can-eat
  • domain name
  • internet café
  • internet-enabled
  • interweb
  • IP
  • keyboard warrior
  • landing page
  • refresh
  • shopping basket
  • upvote
  • user experience
  • utility computing
  • UX
  • virally
  • visitor
See more results »
(Definition ofcaptchafrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

Examplesofcaptcha

captcha
Some incorporate the use ofcaptchato ensure user interaction.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
A human brain can readcaptchaletters in seconds, however, even a supercomputer can not do that in a finite time.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Commonly, captchas are dynamically created images of random numbers and/or letters.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Also, many implementations of captchas (particularly ones desired to counter circumvention) are inaccessible to humans with disabilities, and/or are difficult for humans to pass.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
The use of captchas is controversial.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Captchas are used by freemail services to prevent automatic creation of a huge number of email accounts and to protect automatic form submissions on blogs, forums and article directories.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
Acaptchais a challenge-response test frequently used by internet services in order to verify that the user is actually a human rather than a computer program.
From
Wikipedia
Creatives commons iconThis example is from Wikipedia and may be reused under a CC BY-SA license.
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/captcha##
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更新时间：2025/5/6 22:07:12