英语语法分析

Cossack dances are from Russia and Ukraine.

哥萨克舞起源于俄罗斯和乌克兰。

The movements are similar to traditional Cossack activities, for example, sword fighting and getting on and off horses.

这些动作与传统的哥萨克活动类似，如击剑和马术。

In 1649 another Cossack adventurer, Yerofei Khabarov, came to the Amur.

1649年，另一个哥萨克探险家叶罗菲·哈巴·罗夫(Yerofei Khabarov)到达阿穆尔河。