- and have been hunting bison in America for more than 100,000 years.
其在美洲捕杀野牛的历史 已经超过10万年 - To split up the herd...
为了分散野牛群 - ...the pack needs to get them moving.
狼群得让野牛群动起来 - Panic gives the wolves control.
恐慌使狼群获得控制权 - The herd must stick together.
野牛群必须聚在一起 - One trip could prove fatal.
一次跌倒就可能产生致命后果 - But the bison can't run forever,
但野牛不可能永远奔跑