Recall that each process has a parent, and you can trace this family tree of sorts all the way back to PID 1, otherwise known as init.
记住，每个进程都有父进程，并且您可以跟踪从每个子进程一直到PID 1(或称为init)的整个进程家族树。
Figure 1 illustrates the family tree of a few of the UNIX shells.
图1显示了少数unix shell的家族树。
They used this and other HIV-1 genetic sequences to construct a family tree of the origin of the viral strain and to estimate the time of origin of HIV-1 group m.
他们利用这个遗传序列与其他HIV - 1的遗传序列构建出起源病毒株的家系图，并以此估算出HIV - 1 M组的起源时间。
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