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Commutativity and associativity might sound the same, and indeed most commutative operations are also associative. But there are a few math operations that are only one or the other. Matrix multiplication, for example, is associative but not commutative Matrix multiplication - Wikipedia en.wikipedia.org/wiki/Matrix_multiplication#Non-commutativity . And surprisingly, floating point arithmetic — i.e. any math operator in JavaScript — is commutative but not associative Associative property - Wikipedia en.wikipedia.org/wiki/Associative_property#Nonassociativity_of_floating_point_calculation ! ↩，详情可参考体育直播
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从发布会宣传到真正能用，将近一年，可以说整个 Windows 生态 AI PC 的旗舰功能，经历了一整次从头重新设计，尴尬程度其实不亚于 Apple 智能/新版 Siri 的一跳再跳，但可能因为 Windows 生态的声量实在太低，AI PC 没多少人关注，很多人都没听说过这回事。