This is Ardi - the oldest member of the human family tree we've found so far.
科学家昵称她为“阿蒂”，她是讫今被发现的人类族谱上最早期的成员。
That makes it easy to see when particular genetic mutations happened, and thus to construct a human family tree.
这个特点使得特殊的基因突变发生时比较容易看得出来，于是就可以构建一个人类族谱树状图。
But lack of definitive fossil evidence has many guessing whether this primate was really a biped-and just where she might fit on the human family tree.
但由于缺少决定性的化石证据，关于这种灵长类动物是否是两足动物——以及她在人类的家族树中究竟占据什么位置——存在着许多猜测。
Recently, scientists in the chinchilla gene lemurs found HIV and the human (HIV) viruses belong to one family tree.
日前，科学家们在灰鼠狐猴的基因中找到了与人类艾滋病毒（HIV）同属一个族谱的病毒。
Recently, scientists in the chinchilla gene lemurs found HIV and the human (HIV) viruses belong to one family tree.
日前，科学家们在灰鼠狐猴的基因中找到了与人类艾滋病毒（HIV）同属一个族谱的病毒。
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