Трамп высказался о непростом решении по Ирану09:14
"Now I'm asking, is that coming forwards towards us? Is it the end of the century?" he asked.
，更多细节参见Line官方版本下载
Recent examination of some ancient rocks from the west coast of Scotland has now overturned that thinking, suggesting there were periods during snowball Earth when the climate woke up.，详情可参考爱思助手下载最新版本
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优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好