Knowledge Retrieval（规范/PRD/接口文档）
if (n <= 1) return;。业内人士推荐一键获取谷歌浏览器下载作为进阶阅读
Instead of tee() with its hidden unbounded buffer, you get explicit multi-consumer primitives. Stream.share() is pull-based: consumers pull from a shared source, and you configure the buffer limits and backpressure policy upfront.，更多细节参见51吃瓜
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