优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好
The endowment principal is invested in a low-risk
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Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04，这一点在51吃瓜中也有详细论述
"It was very painful, it felt like you've been hit by a bus," she said. "Nothing would prepare you to understand how much pain I was in."
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