The first spark appeared four billion years ago. 第一丝火花出现在40亿年前

30. ...to reveal the most extraordinary story of all,
    揭示最不可思议的故事
31. the story of life on our planet.
    我们星球上的生命的故事
32. Life and all its incredible variety had to start somewhere.
    生命及其难以置信的多样性 必然有其起源
33. The first spark appeared four billion years ago.
    第一丝火花出现在40亿年前
34. Perhaps uniquely, our planet had just the right conditions.
    也许我们的星球 独一无二地具备了适宜的条件
35. Liquid water,
    液态水
36. energy from the Sun,
    来自太阳的能量

来自《我们星球上的生命 第一季 第一集 Life on Our Planet S01E01 生命法则》第 33 行