distant frontier regions

• 辽远的边疆

distant frontier regions的用法和样例：

例句

1. A column of wild geese was seen flying into the distant sky.
   但见一行大雁正飞向辽远的天空。
2. Judging from the past, we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity.
   根据过去，我们可以有把握地推断没有一种生物能把它的形貌不变地传往辽远的未来。