estrepement

例句：

1. 1.The staircase leads up to the second floor.
   楼梯通向二楼。
2. 2. The steps are slippery due to the rain.
   由于下雨，这些台阶很滑。
3. 3. The ramp is designed for easy access to the upper level.
   这个斜坡是为了方便上到上层而设计的。