step expression

例句：

1. 1. The engineer carefully measured each step of the construction process.
   工程师仔细测量了建设过程的每个步骤。
2. 2. The old man slowly climbed the steps to reach the top of the hill.
   老人慢慢地爬上楼梯，到达山顶。
3. 3. The children were playing on the steps outside the museum.
   孩子们在博物馆外的台阶上玩耍。