12:52, 27 февраля 2026Мир
A young woman who is battling against social media giants took the stand Thursday to testify about her experience using the platforms as she was growing up, saying she was on social media “all day long” as a child.
，更多细节参见51吃瓜
优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好。safew官方版本下载对此有专业解读
Kevin Church/BBC News
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