然而，去年全球手机网络广告支出仅为15亿美元，仅占全球广告市场总额4240亿美元的一小部分。

Yet spending on ads carried over cell-phone networks last year amounted to just $1.5 billion worldwide, a fraction of the $424 billion global ad market.

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例如，iPhone所有者观看手机网络广告的可能两倍于其他品牌手机用户，并且在玩手机游戏、使用手机定位服务时看广告的可能性也四倍于其他用户。

For example, iPhone owners are twice as likely to see mobile web ads and four times as likely to see an AD while playing a game on their phone or while using a location-based service.

youdao

例如，iPhone所有者观看手机网络广告的可能两倍于其他品牌手机用户，并且在玩手机游戏、使用手机定位服务时看广告的可能性也四倍于其他用户。

For example, iPhone owners are twice as likely to see mobile web ads and four times as likely to see an AD while playing a game on their phone or while using a location-based service.

youdao