number of minimum steps

例句：

1. 1.The robot has to perform a number of minimum steps before it can move forward.
   机器人在前进之前必须执行一系列最小步骤。
2. 2.The engineer had to make a number of minimum steps to ensure the safety of the project.
   工程师必须做出一系列最小步骤以确保项目的安全问题。
3. 3. The company needs to take a number of minimum steps to reduce its carbon footprint.
   公司需要采取一系列最小步骤来减少其碳足迹。