but he can't stay down here forever. 但它不可能永远躲在下面
Its impact will change the world forever... 撞击将永远改变世界
that would change the landscape forever. 将永远改变陆地的样貌
lost from our family tree forever. 永远从我们的族谱中消失
...and was about to change our planet forever. 而且即将永远改变我们的星球
But the invertebrates could not rule forever. 但是无脊椎动物无法永远统治