英语语法分析

Eurasian watermilfoil, a weed not native to Frida Lake, has reproduced prolifically since being accidentally introduced there.

欧亚水草是一种不属于弗里达湖的杂草，自从被意外引进后，就大量繁殖。

This is particularly true of the horse pastoralism that emerged in the Inner Eurasian steppes, for this was the most mobile of all major forms of pastoralism.

在欧亚大陆内部大草原上出现的马的游牧主义尤其如此，因为它是所有主要游牧形式中最具流动性的。

It is the use of horses for transportation and warfare that explains why Inner Eurasian pastoralism proved the most mobile and the most militaristic of all major forms of pastoralism.

正是马在交通运输和战争中的使用，解释了为什么欧亚大陆内部的游牧主义是所有主要游牧形式中最具流动性和最具军国主义色彩的。