family tree

1.A family tree is a diagram with branches, showing how the members of a family are descended and related.

家谱是说明家族成员血缘承袭关系的明细分支图。

2.Historical linguists have to identify and classify families of related languages in a genealogical family tree, and to reconstruct the protolanguage.

历史语言学家们通过对各语系中相关语言进行甄别，勾画出家族谱系图，从而重新构建语系的原始语。