子进程的进程号（PID）将成为这个散列的关键字，而其键值就是该子进程正在处理的相对应的主机地址。
The keys of this hash will be the child process ID (PID), and the value will be the corresponding host that the child is processing.
子进程的进程号（PID）将成为这个散列的关键字，而其键值就是该子进程正在处理的相对应的主机地址。
The keys of this hash will be the child process ID (PID), and the value will be the corresponding host that the child is processing.
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