Let's consider one instance of the genealogical tree model as shown in Figure 3.

让我们考虑一下如图3所示的系谱树形模型的一个实例。

youdao

Let's consider one instance of the genealogical tree model as shown in Figure 3.

让我们考虑一下如图3所示的系谱树形模型的一个实例。

youdao