The much-talked about Wolfram Alpha, or Alpha for short, harnesses massive computing power to answer users' questions, even if they're never been answered on the Web before.

提到Wolfram Alpha或者简单称之为Alpha更多的是，他们利用巨大的计算能力去回答用户的问题，即时所提到的问题在网络上从来没有被回答过。

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Answers to questions - Yahoo Answers allows users to ask questions or answer other user's questions; a simple concept that works well for Yahoo.

回答问题——Yahoo知识堂(Yahoo Answers)支持用户提问或者回答其他用户的问题。这个概念很简单，难得的是Yahoo将它做得很好。

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In recent years, Google has expanded its array of services that seek to directly answer users' queries, departing from its original strategy of sending them quickly to the most relevant site.

WSJ: Google to Buy Frommer's Brand From Wiley & Sons

As powerful as Apple and Google seem, they both answer to customers and users.

FORBES: We Have Met the Evil and It Is Not Google or Apple: It Is Us

After taking the photo, the app prompts users to answer three simple questions: Is the water level dry, some or full?

FORBES: IBM Launches iPhone App For Crowdsourcing Water Quality