Is just a link in a chain of innumerable living beings... 只不过是四十亿年来 地球上接连出现的

15. Similar to so many similar clusters in the universe.
    与宇宙中无数其他星云无异
16. Yet this was where the miracle of life occurred.
    然而 这里却是生命奇迹诞生的地方
17. Today, life- our life-
    今天 生命 我们的生命
18. Is just a link in a chain of innumerable living beings...
    只不过是四十亿年来 地球上接连出现的
19. That have succeeded one another on earth over nearly four billion years.
    无数生命链上的一环
20. And even today,
    直至今天
21. new volcanoes continue to sculpt our landscapes.
    新火山继续塑造着地表风貌

来自《家园 第一部分 Home Part1》第 18 行