Yeah, it's a side-by-side comparison. It was a stair step down on every corner.

是的，这是并排比较。每个拐角处都是一阶。

IT BROKE INTO ITS MANY STAIR STEPS.

它闯入了许多楼梯台阶。

The water was creeping up the stairs, step by step.

水沿着楼梯往上爬，一步一步。