AdInterax was bought to empower Yahoo's web based AD tools.

收购AdInterax确保Yahoo基于web的广告工具。

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They could have found ad-based systems, or other business models, based on giving value to people.

那样他们就能发现基于广告的系统，或是其它能给人们带来价值的商业模式。

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What you need in these situations is a document-based, schema-free, ad-hoc database with a flat address space.

在这些情况下，您需要的是一个基于文档的、没有模式的、具有扁平地址空间的特别数据库。

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Twitter also dropped the minimum bid for its auction-based ad system from 50 cents to a penny.

FORBES: Twitter Launches Ads Targeted To Interests--Starting At A Penny

Investors will thus need to ponder whether its mainly computer-based ad business justifies such a lofty valuation.

ECONOMIST: Valuing Facebook

Salgado's Phoenix-based ad shop, Knoodle, bills Schwartz for 30 hours a week to maintain his Twitter and Facebook pages.

FORBES: Magazine Article