求教OG12-12(382页第21行)"some AI tribes have....based on..."这句话的语法结构

jenny0827

Some AI tribes have also established water rights through the court based on their traditional diversion and use of certain waters prior to the US' acquisition of sovereignty.

based on 后的那个their指代的是tribes吗？那后面的diversion是不是指印第安部落的分支？

请热心人指导！谢啦

jenny0827

Some AI tribes have also established water rights through the court based on their traditional diversion and use of certain waters prior to the US' acquisition of sovereignty.

based on 后的那个their指代的是tribes吗？那后面的diversion是不是指印第安部落的分支？

请热心人指导！谢啦

-- by 会员 jenny0827 (2010/6/13 13:29:40)

自问自答，应该就是这样地~

稚子鱼鱼

diversion是指AI tribes以前用水的水渠道路，我这样理解。