step pitch

例句：

1. 1. The old man climbed the stairs to reach his office.
   老人爬楼梯去他的办公室。
2. 2. The children were playing on the steps outside the school.
   孩子们在校外学校的台阶上玩耍。
3. 3. The new restaurant has a unique design with a series of steps leading up to the entrance.
   这家新餐厅有一个独特的设计，有一系列台阶通向入口。