摘要
2011年，Facebook即将接近每月10亿活跃用户之际，也面临了令人头痛的危机：人脸识别算法未经本人同意就在照片中对用户加以标记，引发舆论一片哗然。六年后，Facebook即将迈向20亿使用者的里程碑，那种抱怨听起来好像过时了。
In 2011 as Facebook inched ever closer to 1 billion active monthly users, it faced a vexing crisis： uproar about a facial recognition algorithm that tagged people in photos without their consent. Six years later, and as Facebook nears the 2-billion-user milestone, that complaint almost seems quaint.
