But if CAPTCHAs are broken it might not be a bad thing, because it would signal a breakthrough in machine vision that would, for example, make automated book-scanners far more accurate.

而验证码系统被破解倒也未尝不是一件好事，因为这标志着机器视觉取得突破，或许，自动书刊扫描系统将由此变得远比现在精准。

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Indeed, if you can get a wifi signal, you can buy a book.

的确，只要能有无限网络，就能买到书。

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A new book on the Titanic has suggested that the doomed liner did not send out a distress signal for three quarters of an hour after it hit the iceberg which ruptured its hull.

一本关于泰坦尼克号的新书说这艘毁灭的班轮在撞上毁坏船体沉没前的45分钟内冰山没有发出求救信号。

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Just prior to the election this year, Rose interviewed Nate Silver, who describes his statistical analysis of polls, what ultimately were his correct predictions for the major elections of the year, and his book, The Signal and the Noise.

FORBES: Top Ten Technology Articles and Interviews of 2012

You see the system of blinks to signal to an assistant working with him each letter of the book.

NPR: A Beautiful Movie: 'The Diving Bell and the Butterfly'

Abroad, many others saw the issue, and the book, not as a way to bash America but as a genuine warning signal to their own consumerist societies.

NPR: Rabid Reader: 'Fat Land' and U.S. Supersizing