He says there is a new trend of violence in the Upper Nile State, which is very different from the inter-tribal violence that used to occur there.

他说上尼罗州目前的暴力趋势同以往在那发生的不同种族间的暴力冲突极为不同。

Allowing them to better adapt to changing conditions and as a valuable asset in inter-tribal warfare.

使得他们能更好地适应环境的变化，同时成为了一种部落内战中抢手的战利品。