His head sank down AD he fell asleep.

他睡着时头垂了下来。

youdao

If you have stairs in your house, walk up and down the stairs a few times, during each AD break for at least one show every day.

如果你的屋子有楼梯，每天至少在一个电视剧间隙或广告时间，上下楼梯几次。

youdao

Pearson, the London-based publisher that owns the paper, does not break out separate figures for it, but analysts say its AD revenue is probably down at least 20 percent compared with last year.

伦敦出版商、该报纸所有者培生集团受到的冲击并不大，但分析师认为其广告收入将比去年至少下降了20%。

youdao

Ad sales have always gone up and down with the economy.

VOA: special.2009.03.21

But smaller screen sizes than PCs, less sophisticated ad targeting and wariness by advertisers is holding down ad rates or spending on mobile devices.

WSJ: Twitter's Mobile Ads Begin to Click

Typically accountability for effectiveness has pushed down ad prices.

FORBES: Winners & Losers In Google TV

In the end, the winners may prove to be online advertisers, who will see the potential for resulting stronger competition for Google to drive down ad rates and provide new advertising services.

FORBES: A Messy Marriage