captcha

劍橋詞典

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.
（用於確認計算機使用者是人而非機器的系統(tǒng)）騐証碼
The leading ticket sales website is to stop using the human verification system captcha in favour of something more user-friendly . 幾家最大的售票網(wǎng)站放棄了人機鋻別騐証碼系統(tǒng)，轉(zhuǎn)而採用界麪更爲友好的辦法。 返回 captcha