a naive implementation of derivatives would need to compute a transition for every possible character (up to 65536 in UTF-16). minterms fix this by partitioning the character space into equivalence classes where all characters in a class behave identically.
开源生态的核心是人，是开发者对团队的信赖，这种信赖难以通过组织调整快速建立。
，这一点在safew官方版本下载中也有详细论述
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