Far back in the depths of time, 很久很久以前

4. But this is the story of what was happening beneath the waves.
   但本集将讲述的是海浪下发生的故事
5. Here, shielded from the storms, life had taken hold...
   这里远离风暴 生命已经扎根
6. ...and was about to change our planet forever.
   而且即将永远改变我们的星球
7. Far back in the depths of time,
   很久很久以前
8. Earth looked nothing like the world we know today.
   地球的样貌与现在完全不同
9. Nearly 90% of its surface was water,
   当时的地表将近90%由水覆盖
10. yet this was no blue planet.
    但当时的地球并非蓝色

来自《我们星球上的生命 第一季 第二集 Life on Our Planet S01E02 第一前线》第 7 行