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.
“脚要踩在大地上。我们干任何事情都有内在规律。”
。关于这个话题，heLLoword翻译官方下载提供了深入分析
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（二）为他人组织作弊提供作弊器材或者其他帮助的；