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特点：与 GELU 类似，是一种平滑版 ReLU。
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Nature, Published online: 24 February 2026; doi:10.1038/d41586-026-00517-9。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Can be executed in many different runtimes (including in browsers today, with a polyfill).