Dozens of start-ups unveil their lovingly built sites each day, but most people already have their fill of social network profiles to update and friend requests to weigh.

每天都有数十家网站初创公司在网上发布他们可爱的网站，但是大多数人们已经有了自己的社交网络图谱，并有一定的朋友圈子。

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The firm has announced plans for a Twitter-like private social network, called Toyota Friend, which will be integrated into some electric and hybrid vehicles in Japan next year.

丰田还公布了建立一个类似推特的非公开社交网络“丰田之友”的计划，该网络会应用于明年在日本推出的电动及混合动力车上。

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Facebook is a loose social network; a "friend" on Facebook might translate to someone you'd barely recognize in real life.

Facebook是一个松散的社会网络；Facebook上的一个“朋友”可能变成现实生活中几乎不敢打招呼的人。

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As an admirer of the great comic writer and actor (and gadget obsessive) I was delighted to spot him on another friend's network.

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

In the year to come, security professionals are warning of bank code-stealing exploits that are much slicker and more convincing--hidden in guises as harmless as a banner ad on a reputable Web site or a message from a friend on a social network.

FORBES: Future Phishing

Facebook does have a privacy safeguard in place in that you have to approve the content before it shows up on your profile page, but this is yet another step away from being a closed social network where your choices about who you friend determine your experience there.

FORBES: Facebook Finally Helps Users Avoid Being Tagged in Embarrassing Photos, But Also Expands Who Can Tag