The media access control (MAC) protocol of mobile Ad Hoc networks (MANETs) is closely-related with its physics layer, most MAC protocols request the capability of carrier sense in physical layer.

无线自组网的介质访问控制(MAC)协议是与物理层密切相关的，大多数MAC协议都要求物理层具备载波感知能力。

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It is, in the composition of individual ad. s, closely associated with writing skills, strategic design and consumer want, and therefore, it is necessary to view it from different angles.

在广告文案的写作中它与写作技巧、广告的策略创意以及消费者心理密不可分，因此从不同的角度可以看到其不同的特点。

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Twitter, which is closely held, declined to specify its ad revenue.

WSJ: Twitter's Mobile Ads Begin to Click

Viewers, and the ad industry, will watch closely to see if Gildan joins the ranks of successful advertisers or stumbles in its first (and then potentially only) ad attempt.

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There wasn't a lot of room for messy, ad hoc assumptions to make the model more closely fit the facts.

BBC: The Nobel prize, and the ONS