Some are from the same clan as Deinonychus; others are from more primitive groups like Oviraptors and Tyrannosaurs.
有些与恐爪龙属于同一氏族；有些则来自恐爪龙。其他的则来自更原始的群体，如偷蛋龙和暴龙。
Primitive group
原声例句
古生物经典纪录片
英语百科
Primitive permutation group
（重定向自Primitive group）
In mathematics, a permutation group G acting on a set X is called primitive if G acts transitively on X and G preserves no nontrivial partition of X. (The hypothesis of transitivity can be dropped if 
.) Otherwise, if G is transitive and G does preserve a nontrivial partition, G is called imprimitive.
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