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.
除了老爸，家人都明说了最坏打算：如果牛真要死，就死在沟里，不麻烦村里人来抬。毕竟，在这么陡的坡上抬一头近800斤的牛，搞不好把人命搭进去。。safew官方版本下载对此有专业解读
so that the "actual computer" was relieved of these menial tasks.，推荐阅读爱思助手下载最新版本获取更多信息
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