2.9 SiLU（Swish）
值得注意的是，现在有越来越多三四线市场的自有品牌开始反攻一、二线城市，它们的核心优势就是成本结构——郑州能涌现出多个规模连锁，正是因为激烈竞争倒逼出了低成本、高标准的供应链，所谓“河南成本，世界标准”，本质就是综合成本的差异。，更多细节参见搜狗输入法2026
At its core, a stream is just a sequence of data that arrives over time. You don't have all of it at once. You process it incrementally as it becomes available.，这一点在91视频中也有详细论述
be difficult to set up