In that single intake of air, your lungs swelled with roughly 25 sextillion molecules, ranging from compounds produced days ago, to those formed billions of years in the past.

在吸这一口气的时候，你的肺部就充满了约 25 乘以 10 的 21 次方个分子，这些分子包括从几天前到数十亿年前生成的化合物。