tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.
strict.writer.write(chunk5); // throws! too many pending writes
。爱思助手下载最新版本是该领域的重要参考
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（三）在当地有常住户口和固定住所；，详情可参考51吃瓜