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.
or line printers for things like warehouse picking slips.
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当然，还有24 个行业加大了研发投入力度——包括排名领跑的四大行业。其中，汽车制造业的表现尤为突出——在披露研发企业数量微增3%的情况下，研发投入同比增幅达到17.29%，排名也从上年第五跃至第三。，详情可参考一键获取谷歌浏览器下载
They warn that as SpaceX chief Elon Musk pledges to launch one million satellites in the coming years, this contamination could be the tip of the iceberg.