This agenda improves the genetic variety of offspring, and the greater the variety, the better our genes' chances of surviving into the future. Cold, heartless, but effective.
这种设定有助于改善后代的遗传品种，使优秀的基因能够在优胜劣汰的进程中得以保存。这非常冷酷无情，但很有效果。
The wide distribution of this fox in the severe arctic environment is due to its excellent adaptation to cold and to a wide variety of foods.
由于北极狐对寒冷有极好的适应力，并且该地区存在着多种食物来源，因而它们能够广泛地分布在环境严峻的北极地区。
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