你脑子里的一个灵感，不用再经过反复的修改和焦躁的等待。敲下回车的瞬间，它就在那里了。自然、简单，且立等可取，这件事听起来平常，但能做到，其实已经很难得了。
// TypeError: Cannot obtain lock — stream is permanently locked
。旺商聊官方下载是该领域的重要参考
How does the new chickenpox vaccination work?
Graceful Fallback for Extreme Customization:
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.