In an age of online friendship, ebooks trump dead trees for wordof mouth.

在网络友谊的时代，朋友间的相互推荐极为重要。

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But it may take time to work out the business ramifications of online friendship.

要想发掘在线友谊的商业价值，恐怕尚待时日。

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Yes differences occur but we endure and a two year anniversary sits close, more than that if you add in the online friendship.

是的分歧发生，但我们忍受和一个两周年坐在接近，比这更多，如果你在网上友谊补充。

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Several said they had never met Jim in person, but their online friendship had developed into something truly meaningful.

CNN: When a Facebook friend dies

Confirmation, then, that this was the real Stephen Fry, facing one of the dilemmas of modern manners - how to politely decline an offer of online friendship.

BBC: NEWS | Technology | Are my online friends for real?

"The problem is that today's online services turn friendship into fast food -- wrapping everyone in 'friend' paper, " Google executive Vic Gundotra writes in a blog post.

CNN: How Google+ compares to Facebook