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為世界各地22億用戶提供了有趣、免費而且非常受歡迎的服務(wù)。但Facebook的一個很大的缺點是，它也為極端分子、煽動者和間諜敞開了攻擊民主的大門。
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