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SUMMARY：

Concernsthat teenagers could be bored with Facebook

CONTENT：

David Ebersman, Facebook's chief financial officer, saidthere was a lack of reliable data about the number of teens on the site, asthey were less likely to be honest about their age. Attempting to assuage concerns about the lack of growth among teen users, he said: "We remain close to fully penetrated among teens in the US."

However, he also warned that growth in the number of adverts in the newsfeed, which had been a "meaningful driver of revenue", would not continue at the samerate in the future. Mobile revenue rose in the third quarter to reach 49 percent of total advertising revenue – up from just 14 per cent in the same quarter last year.

Mobile monthly active users were 45 percent higher than the year before at 874m, and more than 500m people used Facebook on their mobile devices each day on average during September.

KEYWORDS:

David Ebersman：戴維·埃博斯曼

newsfeed：信息流

參考譯文1：

Facebook的青少年用戶數(shù)量增長(zhǎng)緩慢，為了減輕公司股東對(duì)此的憂慮，其首席財(cái)務(wù)官戴維·埃博斯曼表示， facebook用戶中青少年人數(shù)的統(tǒng)計(jì)數(shù)據(jù)缺乏可靠性，因?yàn)橛脩舸蠖嗖粫?huì)登記真實(shí)年齡。 “我們?nèi)詫⒉贿z余力的在美國(guó)青少年中推廣使用facebook”

然而，戴維·埃博斯曼也不無擔(dān)心的表示，信息流廣告一度為公司創(chuàng)造了可觀的收入，但是今后信息流廣告數(shù)量的增幅將不容樂觀。第三季度中移動(dòng)業(yè)務(wù)收入占全部廣告收入的49%-與去年同期14%的比例相比有所提高。

移動(dòng)客戶端的月活躍用戶達(dá)到了8.74億，與去年相比增長(zhǎng)了45%。九月份，平均每天有超過5億人在使用facebook移動(dòng)客戶端。

參考譯文2：

Facebook首席財(cái)務(wù)官大衛(wèi)·伊伯斯曼說，由于Facebook的青少年用戶在賬號(hào)的個(gè)人信息中不愿意填寫他們的真實(shí)年齡，所以這部分用戶的數(shù)量還缺少可靠的數(shù)據(jù)。為了減輕青少年用戶數(shù)量增長(zhǎng)緩慢的憂慮，他說：“我們?nèi)詫⒗^續(xù)在美國(guó)青少年中全面滲透�！�

然而，他也警告說，信息流方面的廣告數(shù)量增長(zhǎng)一直是促進(jìn)公司收入的強(qiáng)大動(dòng)力，但是在將來不會(huì)再如此了。第三季度的移動(dòng)收入增長(zhǎng)到占整個(gè)廣告收入的49%，相比去年同期的14%來說是增長(zhǎng)了。

每月活躍用戶相比去年的8.74億人增長(zhǎng)了45%。九月份，每天在移動(dòng)設(shè)備上使用facebook的人超過了5億。