So, two boats of equal size were put on top of each other and nailed together.

因此，将两艘大小相同的船叠放在一起并用钉子钉在一起。

These latter cells are nearly spherical and of nearly equal sizes, and are aggregated into an irregular mass.

后面的这些细胞几乎是球形的， 大小几乎相等， 并且聚集成不规则的团块。

The answer is given by this formula: distance equals step size times the square root of the number of steps.

这个公式给出了答案：距离等于步长乘以步数的平方根。