One of the biggest pitfalls came late last year, when Facebook announced an advertising program called Beacon that broadcast news of users' online purchases to their friends.
最大的失误之一发生在去年，当时Facebook宣布了代号“灯塔（Beacon）”的计划，将其用户的在线购买信息发送给他们的朋友。
One of the biggest pitfalls came late last year, when Facebook announced an advertising program called Beacon that broadcast news of users' online purchases to their friends.
最大的失误之一发生在去年，当时Facebook宣布了代号“灯塔（Beacon）”的计划，将其用户的在线购买信息发送给他们的朋友。
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