| 词汇 | captcha |
| 释义 | captcha noun[ C or U ] uk /ˈkæp.tʃə/ us /ˈkæp.tʃə/ internet & telecoms specialized a system that is used to make sure that a human being, not a machine, is using a computer. The person may be asked to type in a series of letters or numbers, or to complete a simple game. The word captcha is made up of the first letters of words in the phrase Completely Automated Public Turing test to tell Computers 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 The leading ticket sales website is to stop using the human verification system captcha in favour of something more user-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。 Internet terminology .plc.uk 2FA 2SV above/below the foldidiom address bar affiliate link atm hybrid Instagrammable Instagrammer instant-message internet internet-enabled service provider the World Wide Web timeline trackback trend troll factory trolling Examples of captchacaptcha Some incorporate the use of captcha to ensure user interaction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A human brain can read captcha letters in seconds, however, even a supercomputer can not do that in a finite time. From Wikipedia This 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 This 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 This example is from Wikipedia and may be reused under a CC BY-SA license. The use of captchas is controversial. From Wikipedia This 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 This example is from Wikipedia and may be reused under a CC BY-SA license. A captcha is 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 This 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. |
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