Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.
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。
。业内人士推荐同城约会作为进阶阅读
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