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.
Number: All the pips in this space must add up to the number.
。关于这个话题，51吃瓜提供了深入分析
Plaud、BubblePal等公司的初期爆发，无不验证了这一点：硬件本身就是一个可盈利的SKU。
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