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.

youdao

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.

youdao