Силовые структуры
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公式： f(x)=x⋅σ(x)，详情可参考heLLoword翻译官方下载
"It blows my mind because you think 'if you just drive 30 minutes down the road, Lancashire is a major hub of manufacturing that's still going on now, people are producing things here'."。同城约会是该领域的重要参考