Facebook provides a fun, free and remarkably popular service to 2.2bn users around the world. But the downside, and it is a very big one, is that the social network has opened the door for extremists, propagandists and spies to hack democracy.
Facebook为世界各地22亿用户提供了有趣、免费而且非常受欢迎的服务。但Facebook的一个很大的缺点是,它也为极端分子、煽动者和间谍敞开了攻击民主的大门。
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