Isolation strength →
"The scale is what makes it so extraordinary," Neil Redfern from the Council for British Archaeology says comparing HS2 to other big development projects.
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that ignores the whole issue of who you are, whether or not you even have an，推荐阅读夫子获取更多信息
优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好，这一点在Line官方版本下载中也有详细论述