The situation threatens gains made in its rhino populations in the nineteen nineties.
问题描述：
The situation threatens gains made in its rhino populations in the nineteen nineties.
尤其是这部分gains made in its rhino population
答
找出句子主干就知道了：The situation threatens gains.“made in its rhino populations”是后置定语,用来修饰gains.“in the nineteen nineties”是时间状语.整句话意思就是：二十世纪九十年代,犀牛种群恢复所取得...