由于游牧民族善骑射、机动性强，往往越长城，进入中原。
As the nomads of good riding and shooting, mobile, often the more the Great Wall, entered the Central Plains.
一些外来乐器因此进入中原地区，从而使中国的乐器史发生了重大的变革，其中以笛和箫的演进最为明显。
Some of the Musical Instruments were brought into the central plains and revolutionary changes took place in Chinese musical history. The development of flute and Xiao was most prominent.
本文认为粟末靺鞨被高句丽打败以后，主体部分降隋进入中原，后随安史乱军南下居于华北地区，多融入汉族之中。
This paper thinks that the principal part of Sumomohe people, after being defeated by Gaogouli, entered the central plains and most of them inosculated into Han people.
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