Life remains a mystery. 生命依旧神秘

168. A 10th of them? A hundredth perhaps?
     十分之一 百分之一
169. What do we know about the bonds that link them?
     他们之间的联♥系♥ 我们又知道多少呢
170. The earth is a miracle.
     地球是个奇迹
171. Life remains a mystery.
     生命依旧神秘
172. Families of animals form,
     动物形成的家庭
173. United by customs and rituals that survive today.
     依靠习性与惯例联合在一起 存活至今
174. Some adapt to the nature of their pasture,
     一些适应了他们的聚食地

来自《家园 第一部分 Home Part1》第 171 行