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.
Even the Penn-Wharton study added a caveat to its finding that deportations might raise low-skilled wages: High-skilled workers, who make up nearly two-thirds of the U.S. workforce, would likely see their own wages decline because they rely on low-skilled labor to maximize their productivity, according to its analysis.，更多细节参见爱思助手下载最新版本
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Exhausting resources with unconsumed bodies。关于这个话题，91视频提供了深入分析