Several American ISPs have quietly switched on NebuAd's system, inserted a brief reference to it in their terms and conditions, and hoped that nobody would mind.

一些美国IS P悄悄地开启NebuAd系统，在网页流中置入以它们的条款和条件而作的简短引用，并认为用户不会在意。

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The external content management reference feature, for example, can be used to relate the terms and conditions to an image or document in a content management system. Examples include.

例如，可以使用外部内容管理引用特性将条款和条件关联到内容管理系统的图像或文档中。

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However, if this level cannot be reached under the prevailing country-specific conditions, the reference level should not exceed 300 Bq/m3.

但是，如果在国家现有特定情况下不能达到这一水平，参考水平也不应超过300 Bq/m3。

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Buyers and suppliers who have no binding relationship, by contrast, and who stick to standard legal tenders without reference to current difficult market conditions, could find themselves in a new realm of uncharted territory with little trust.

WSJ: United They'll Stand

ISPs have quietly switched on NebuAd's system, inserted a brief reference to it in their terms and conditions, and hoped that nobody would mind.

ECONOMIST: Behavioural targeting