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1、ancestry
血统；祖先；
The origin of vertebrates and their ancestry are problems still obscured by too few facts.
脊椎动物的起源和它们的始祖问题，由于事实太少仍然不很清楚。
2、tribal
部落的；部族的；
Human beings are all gregarious, both tribal and racial.
在部落和种族之间人类生命都是群居的。
This old so-called tribal nobility disappeared for the most part during the migrations or soon afterwards.
这种古代的所谓部落贵族，大多数在民族大迁徙中或在它以后不久便消灭了。
