通过修改个人隐私设置，你可以(至少在理论上)选择只把信息透露给属于朋友圈的人。

By modifying personal privacy Settings, one can, at least in theory, choose to give out information only to those who are in one's friendship network.

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在人们给自己的朋友圈同事圈发邮件的时候，你就可以撤了。

Then stand back while people E-mail to their own network of friends and associates.

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