A very popular free service with a large user base is Bloglines. Bloglines offers these features.

一种具有大量用户的非常流行的免费服务是Bloglines。

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It does not have a large user base like Facebook; but this distributed approach is really promising!

它不像facebook那样拥有一个庞大的用户群，但是这种分布式的方案真的很有前途！

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Experts point to Groupon's ability to leverage Tencent's large user base as its only chance for survival in the saturated market.

在这里输入译文专家指出，Groupon利用腾讯众多用户的影响力是其在一个已经饱和的市场生存的唯一机会。

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CouchSurfing boasts a surprisingly large user base of three million people in 81, 000 cities.

FORBES: Non-Profit CouchSurfing Raises Millions In Funding

Paul Gelb, a Razorfish vice president, said he has been impressed with Tumblr's large user base and creativity.

WSJ: Tumblr's President Resigns

But so did MySpace, a pioneering social networking site that had established a large user base ahead of Facebook.

FORBES: Just How Much is Facebook Worth?