continue to support life, just as they have for billions of years. 数十亿年如一日 持续支撑着生命
life took billions more years to develop real complexity. 又花了数十亿年 才发展出真正的复杂性
The earth counts time in billions of years. 地球以亿为单位计算时间
These strata are the product of those billions and billions of shells. 这些地层便是数以亿计的贝壳的产物
And their billions of descendants... 以及他们的亿万后代
is created by billions of moving sand grains vibrating against one another. 是由数十亿沙粒相互振动而产生的
they feed anchovy that gather here in billions. 它们是聚集在这里的数十亿条凤尾鱼的食物来源
With billions of ant colonies across the world's grasslands 数十亿蚁群遍布全球草原